New to networking in java...

**jigglywiggly** · 05-23-2010, 08:18 AM

Ok so my first lovely project for networking in java is a distrubuted primenumber generator... shouldn't be too hard, and I got most of it done.

However, it just seems to freeze when I say
reader.readLine());

Let me show you the code: (This is based on the celsius converter from Sun, heavily modified, shares some old variable names for auto generated code from the GUI modifier in netbeans, really cool feature I never knew about.)

Anyway

Java Code:

/*
 * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Sun Microsystems nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * TheGUI.java
 *
 */
package learn;

import java.util.LinkedList;
import java.io.*;

import java.net.*;
import java.util.*;
import java.awt.*;
import javax.swing.*;
import javax.imageio.*;

public class TheGUI extends javax.swing.JFrame {

    int PrimestoCompute = 0;
    int NumberofPrimes = 0;
    LinkedList TempNodes = new LinkedList();
    LinkedList RealNodes = new LinkedList();
    BufferedReader reader;

    /** Creates new form TheGUI */
    public TheGUI() {
        initComponents();
        setTitle("3dslice.net PrimeGen");
        this.setIconImage(Toolkit.getDefaultToolkit().getImage("lolface.jpg"));


    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        tempTextField = new javax.swing.JTextField();
        celsiusLabel = new javax.swing.JLabel();
        convertButton = new javax.swing.JButton();
        fahrenheitLabel = new javax.swing.JLabel();
        tempTextField1 = new javax.swing.JTextField();
        tempTextField2 = new javax.swing.JTextField();
        tempTextField3 = new javax.swing.JTextField();
        tempTextField4 = new javax.swing.JTextField();
        tempTextField5 = new javax.swing.JTextField();
        tempTextField6 = new javax.swing.JTextField();
        tempTextField7 = new javax.swing.JTextField();
        tempTextField8 = new javax.swing.JTextField();
        tempTextField9 = new javax.swing.JTextField();
        celsiusLabel1 = new javax.swing.JLabel();
        celsiusLabel2 = new javax.swing.JLabel();
        celsiusLabel3 = new javax.swing.JLabel();
        celsiusLabel4 = new javax.swing.JLabel();
        celsiusLabel5 = new javax.swing.JLabel();
        celsiusLabel6 = new javax.swing.JLabel();
        celsiusLabel7 = new javax.swing.JLabel();
        celsiusLabel8 = new javax.swing.JLabel();
        celsiusLabel9 = new javax.swing.JLabel();
        tempTextField10 = new javax.swing.JTextField();
        celsiusLabel10 = new javax.swing.JLabel();
        convertButton1 = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("Celsius Converter");

        tempTextField.setText("0");
        tempTextField.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                tempTextFieldActionPerformed(evt);
            }
        });

        celsiusLabel.setText("# Of Prime Numbers to Calculate");

        convertButton.setText("Calculate!");
        convertButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                convertButtonActionPerformed(evt);
            }
        });

        fahrenheitLabel.setText("3dslice.net");

        tempTextField1.setText("0.0.0.0");
        tempTextField1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                tempTextField1ActionPerformed(evt);
            }
        });

        tempTextField2.setText("0.0.0.0");
        tempTextField2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                tempTextField2ActionPerformed(evt);
            }
        });

        tempTextField3.setText("0.0.0.0");
        tempTextField3.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                tempTextField3ActionPerformed(evt);
            }
        });

        tempTextField4.setText("0.0.0.0");
        tempTextField4.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                tempTextField4ActionPerformed(evt);
            }
        });

        tempTextField5.setText("0.0.0.0");
        tempTextField5.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                tempTextField5ActionPerformed(evt);
            }
        });

        tempTextField6.setText("0.0.0.0");
        tempTextField6.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                tempTextField6ActionPerformed(evt);
            }
        });

        tempTextField7.setText("0.0.0.0");
        tempTextField7.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                tempTextField7ActionPerformed(evt);
            }
        });

        tempTextField8.setText("0.0.0.0");
        tempTextField8.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                tempTextField8ActionPerformed(evt);
            }
        });

        tempTextField9.setText("0.0.0.0");
        tempTextField9.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                tempTextField9ActionPerformed(evt);
            }
        });

        celsiusLabel1.setText("Client 1");

        celsiusLabel2.setText("Client 2");

        celsiusLabel3.setText("Client 4");

        celsiusLabel4.setText("Client 3");

        celsiusLabel5.setText("Client 5");

        celsiusLabel6.setText("Client 6");

        celsiusLabel7.setText("Client 7");

        celsiusLabel8.setText("Client 8");

        celsiusLabel9.setText("Client 9");

        tempTextField10.setText("0.0.0.0");
        tempTextField10.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                tempTextField10ActionPerformed(evt);
            }
        });

        celsiusLabel10.setText("Client 10");

        convertButton1.setText("Clients Ready");
        convertButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                convertButton1ActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                        .addComponent(tempTextField2, javax.swing.GroupLayout.Alignment.LEADING)
                        .addComponent(tempTextField3, javax.swing.GroupLayout.Alignment.LEADING)
                        .addComponent(tempTextField4, javax.swing.GroupLayout.Alignment.LEADING)
                        .addComponent(tempTextField5)
                        .addComponent(tempTextField6)
                        .addComponent(tempTextField7)
                        .addComponent(tempTextField8)
                        .addComponent(tempTextField9)
                        .addComponent(tempTextField10, javax.swing.GroupLayout.DEFAULT_SIZE, 92, Short.MAX_VALUE)
                        .addComponent(tempTextField1, javax.swing.GroupLayout.Alignment.LEADING)
                        .addComponent(tempTextField, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.PREFERRED_SIZE, 62, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addComponent(convertButton1))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(fahrenheitLabel)
                    .addComponent(celsiusLabel9)
                    .addComponent(celsiusLabel10)
                    .addComponent(celsiusLabel8)
                    .addComponent(celsiusLabel7)
                    .addComponent(celsiusLabel6)
                    .addComponent(celsiusLabel5)
                    .addComponent(celsiusLabel3)
                    .addComponent(celsiusLabel4)
                    .addComponent(celsiusLabel2)
                    .addComponent(celsiusLabel1)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                        .addComponent(celsiusLabel)
                        .addComponent(convertButton)))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addComponent(tempTextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(celsiusLabel))
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addComponent(tempTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(celsiusLabel1))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(tempTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(celsiusLabel2))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(tempTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(celsiusLabel4))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(tempTextField4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(celsiusLabel3))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(tempTextField5, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(celsiusLabel5))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(tempTextField6, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(celsiusLabel6))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(tempTextField7, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(celsiusLabel7))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(tempTextField8, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(celsiusLabel8))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(tempTextField9, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(celsiusLabel9))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(tempTextField10, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(celsiusLabel10))
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(convertButton1)
                    .addComponent(convertButton))
                .addGap(27, 27, 27)
                .addComponent(fahrenheitLabel)
                .addContainerGap())
        );

        pack();
    }// </editor-fold>

    private void convertButtonActionPerformed(java.awt.event.ActionEvent evt) {                                              
//Parse degrees Celsius as a double and convert to Fahrenheit


        int numberofPrimes = (int) ((Double.parseDouble(tempTextField.getText())));
        NumberofPrimes = numberofPrimes;
        System.out.println(NumberofPrimes);





        String get1 = tempTextField1.getText();
        TempNodes.add(get1);

        String get2 = tempTextField2.getText();
        TempNodes.add(get2);

        String get3 = tempTextField3.getText();
        TempNodes.add(get3);

        String get4 = tempTextField4.getText();
        TempNodes.add(get4);

        String get5 = tempTextField5.getText();
        TempNodes.add(get5);

        String get6 = tempTextField6.getText();
        TempNodes.add(get6);

        String get7 = tempTextField7.getText();
        TempNodes.add(get7);

        String get8 = tempTextField8.getText();
        TempNodes.add(get8);

        String get9 = tempTextField9.getText();
        TempNodes.add(get9);

        String get10 = tempTextField10.getText();
        TempNodes.add(get10);


        for (int i = 0; i < 10; i++) {
            if (!(TempNodes.get(i).equals("0.0.0.0"))) {
                RealNodes.add(TempNodes.get(i));
            }
        }

        for (int k = 0; k < RealNodes.size(); k++) {
            System.out.println(RealNodes.get(k));
        }
        int count = 0;

        try {
            ServerSocket serverSock = new ServerSocket(4242);
            while (true) {
                Socket sock = serverSock.accept();
                PrintWriter writer = new PrintWriter(sock.getOutputStream());

                if (count < RealNodes.size()) {
                    writer.println(NumberofPrimes / RealNodes.size() + count * NumberofPrimes / RealNodes.size() + " " + (count + 1 * NumberofPrimes / RealNodes.size() - NumberofPrimes / RealNodes.size()));

                    count++;


                InputStreamReader isreader = new InputStreamReader(sock.getInputStream());
               reader = new BufferedReader(isreader);

             [B]  System.out.println(reader.readLine()); //FREEZES HERE![/B]
               writer.close();


                }


              
                //convertStreamToString(isreader);

         //       String lol = reader.toString();

       //         System.out.println(lol);
                writer.close();
             

            }



        } catch (IOException ex) {
            ex.printStackTrace();
        }




        //System.out.println(primeGen(NumberofPrimes));

    }                                             

    private void tempTextFieldActionPerformed(java.awt.event.ActionEvent evt) {                                              
    }                                             

    private void tempTextField1ActionPerformed(java.awt.event.ActionEvent evt) {                                               
        // TODO add your handling code here:
    }                                              

    private void tempTextField2ActionPerformed(java.awt.event.ActionEvent evt) {                                               
        // TODO add your handling code here:
    }                                              

    private void tempTextField3ActionPerformed(java.awt.event.ActionEvent evt) {                                               
        // TODO add your handling code here:
    }                                              

    private void tempTextField4ActionPerformed(java.awt.event.ActionEvent evt) {                                               
        // TODO add your handling code here:
    }                                              

    private void tempTextField5ActionPerformed(java.awt.event.ActionEvent evt) {                                               
        // TODO add your handling code here:
    }                                              

    private void tempTextField6ActionPerformed(java.awt.event.ActionEvent evt) {                                               
        // TODO add your handling code here:
    }                                              

    private void tempTextField7ActionPerformed(java.awt.event.ActionEvent evt) {                                               
        // TODO add your handling code here:
    }                                              

    private void tempTextField8ActionPerformed(java.awt.event.ActionEvent evt) {                                               
        // TODO add your handling code here:
    }                                              

    private void tempTextField9ActionPerformed(java.awt.event.ActionEvent evt) {                                               
        // TODO add your handling code here:
    }                                              

    private void tempTextField10ActionPerformed(java.awt.event.ActionEvent evt) {                                                
        // TODO add your handling code here:
    }                                               

    private void convertButton1ActionPerformed(java.awt.event.ActionEvent evt) {





        




    }

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {
                new TheGUI().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify
    private javax.swing.JLabel celsiusLabel;
    private javax.swing.JLabel celsiusLabel1;
    private javax.swing.JLabel celsiusLabel10;
    private javax.swing.JLabel celsiusLabel2;
    private javax.swing.JLabel celsiusLabel3;
    private javax.swing.JLabel celsiusLabel4;
    private javax.swing.JLabel celsiusLabel5;
    private javax.swing.JLabel celsiusLabel6;
    private javax.swing.JLabel celsiusLabel7;
    private javax.swing.JLabel celsiusLabel8;
    private javax.swing.JLabel celsiusLabel9;
    private javax.swing.JButton convertButton;
    private javax.swing.JButton convertButton1;
    private javax.swing.JLabel fahrenheitLabel;
    private javax.swing.JTextField tempTextField;
    private javax.swing.JTextField tempTextField1;
    private javax.swing.JTextField tempTextField10;
    private javax.swing.JTextField tempTextField2;
    private javax.swing.JTextField tempTextField3;
    private javax.swing.JTextField tempTextField4;
    private javax.swing.JTextField tempTextField5;
    private javax.swing.JTextField tempTextField6;
    private javax.swing.JTextField tempTextField7;
    private javax.swing.JTextField tempTextField8;
    private javax.swing.JTextField tempTextField9;
    // End of variables declaration

    public String convertStreamToString(InputStream is) throws IOException {


        if (is != null) {
            StringBuilder sb = new StringBuilder();
            String line;
            try {
                BufferedReader reader2 = new BufferedReader(new InputStreamReader(is, "UTF-8"));
                while ((line = reader2.readLine()) != null) {
                    sb.append(line).append("\n");
                }
            } finally {
                is.close();
            }
            return sb.toString();
        } else {
            return "";

        }
    }
}

Then here is the Client

Java Code:

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 *
 * @author JigglyWiggly
 */
import java.io.*;
import java.net.*;
import java.util.StringTokenizer;
import javax.swing.JOptionPane;

public class PrimeClient {
    BufferedReader reader;
    PrintWriter writer;

    public void go() {
        try {
            String socker = "";
            socker = JOptionPane.showInputDialog("Enter the Server's IP Address");




            Socket s = new Socket(socker, 4242);
            InputStreamReader streamReader = new InputStreamReader(s.getInputStream());
             reader = new BufferedReader(streamReader);
             writer = new PrintWriter(s.getOutputStream());

      //      Thread readerThread = new Thread(new IncomingReader());
        //    readerThread.start();

            String numberstocomputeupto = reader.readLine();
            reader.close();
            System.out.println(numberstocomputeupto);

            StringTokenizer st = new StringTokenizer(numberstocomputeupto);
            int first = 0;
            int second = 0;

            first = Integer.parseInt(st.nextToken());
            second = Integer.parseInt(st.nextToken());

            System.out.println("Check");
            System.out.println(first);
            System.out.println(second);

            primeGen(first, second);

        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }

    public void primeGen(int compute, int begin) {

        int i = 0;
        int k = 0;
        int count = 0;
        for (i = begin; i < compute; i++) {
            if (!(i % 2 == 0 && i != 2)) //on purposely confusing
            {
                for (k = 2; k <= i / 2; k++) {
                    if (i % k == 0) {
                        break;
                    }
                }

                if (k > i / 2) {
                    System.out.println(i);
                    count++;
                }
            }
        }
        System.out.println("\nTotal: " + count);


        try {
        writer.println(count);
        writer.flush();
        writer.close();
        reader.close();
        } catch(Exception ex) {
            ex.printStackTrace();
        }
    }

  /*  public class IncomingReader implements Runnable {

        public void run() {
        String message;
        try {
            while((message = reader.readLine()) !=null) {
                System.out.println("read " + message);
               
            }
        } catch(Exception ex) {
            ex.printStackTrace();
        }
        }

    }
*/
    public static void main(String[] args) {
        PrimeClient client = new PrimeClient();
        client.go();
    }
}

I mean I saw something with threads, do I need threads if I want to read and send from the server/client? I don't see why I would...
All feedback is greatly appreciated.

**jigglywiggly** · 05-23-2010, 08:20 PM

Anyone...? I know it's really long, but on the first code thingy, just look to where I say //FREEZES HERE

You can ctrl +F that, I mean I would give the line number, except this forum doesn't have that.

**jigglywiggly** · 05-24-2010, 07:04 AM

Ok I changed my code a lot, and now this happens I needed threading.

Java Code:

/*
 * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Sun Microsystems nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * TheGUI.java
 *
 */
package learn;



import java.io.*;
import java.net.*;
import java.util.*;
import java.awt.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.*;

import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.sound.sampled.DataLine;


public class TheGUI extends javax.swing.JFrame {

    int PrimestoCompute = 0;
    int NumberofPrimes = 0;
    LinkedList TempNodes = new LinkedList();
    LinkedList RealNodes = new LinkedList();
    BufferedReader reader;
    ServerSocket serverSock = new ServerSocket(4242);
    Socket sock;


    /** Creates new form TheGUI */
    public TheGUI() throws IOException {
        initComponents();
        setTitle("3dslice.net PrimeGen");
        this.setIconImage(Toolkit.getDefaultToolkit().getImage("lolface.jpg"));


    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        tempTextField = new javax.swing.JTextField();
        LabelTOP = new javax.swing.JLabel();
        convertButton = new javax.swing.JButton();
        LabelBottom = new javax.swing.JLabel();
        tempTextField1 = new javax.swing.JTextField();
        tempTextField2 = new javax.swing.JTextField();
        tempTextField3 = new javax.swing.JTextField();
        tempTextField4 = new javax.swing.JTextField();
        tempTextField5 = new javax.swing.JTextField();
        tempTextField6 = new javax.swing.JTextField();
        tempTextField7 = new javax.swing.JTextField();
        tempTextField8 = new javax.swing.JTextField();
        tempTextField9 = new javax.swing.JTextField();
        Client1 = new javax.swing.JLabel();
        Client2 = new javax.swing.JLabel();
        Client4 = new javax.swing.JLabel();
        Client3 = new javax.swing.JLabel();
        Client5 = new javax.swing.JLabel();
        Client6 = new javax.swing.JLabel();
        Client7 = new javax.swing.JLabel();
        Client8 = new javax.swing.JLabel();
        Client9 = new javax.swing.JLabel();
        tempTextField10 = new javax.swing.JTextField();
        Client10 = new javax.swing.JLabel();
        convertButton1 = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("Celsius Converter");

        tempTextField.setText("0");
        tempTextField.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                tempTextFieldActionPerformed(evt);
            }
        });

        LabelTOP.setText("# Of Prime Numbers to Calculate");

        convertButton.setText("Calculate!");
        convertButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                convertButtonActionPerformed(evt);
            }
        });

        LabelBottom.setText("3dslice.net");

        tempTextField1.setText("0.0.0.0");
        tempTextField1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                tempTextField1ActionPerformed(evt);
            }
        });

        tempTextField2.setText("0.0.0.0");
        tempTextField2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                tempTextField2ActionPerformed(evt);
            }
        });

        tempTextField3.setText("0.0.0.0");
        tempTextField3.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                tempTextField3ActionPerformed(evt);
            }
        });

        tempTextField4.setText("0.0.0.0");
        tempTextField4.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                tempTextField4ActionPerformed(evt);
            }
        });

        tempTextField5.setText("0.0.0.0");
        tempTextField5.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                tempTextField5ActionPerformed(evt);
            }
        });

        tempTextField6.setText("0.0.0.0");
        tempTextField6.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                tempTextField6ActionPerformed(evt);
            }
        });

        tempTextField7.setText("0.0.0.0");
        tempTextField7.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                tempTextField7ActionPerformed(evt);
            }
        });

        tempTextField8.setText("0.0.0.0");
        tempTextField8.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                tempTextField8ActionPerformed(evt);
            }
        });

        tempTextField9.setText("0.0.0.0");
        tempTextField9.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                tempTextField9ActionPerformed(evt);
            }
        });

        Client1.setText("Client 1");

        Client2.setText("Client 2");

        Client4.setText("Client 4");

        Client3.setText("Client 3");

        Client5.setText("Client 5");

        Client6.setText("Client 6");

        Client7.setText("Client 7");

        Client8.setText("Client 8");

        Client9.setText("Client 9");

        tempTextField10.setText("0.0.0.0");
        tempTextField10.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                tempTextField10ActionPerformed(evt);
            }
        });

        Client10.setText("Client 10");

        convertButton1.setText("Help");
        convertButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                convertButton1ActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                        .addComponent(tempTextField2, javax.swing.GroupLayout.Alignment.LEADING)
                        .addComponent(tempTextField3, javax.swing.GroupLayout.Alignment.LEADING)
                        .addComponent(tempTextField4, javax.swing.GroupLayout.Alignment.LEADING)
                        .addComponent(tempTextField5)
                        .addComponent(tempTextField6)
                        .addComponent(tempTextField7)
                        .addComponent(tempTextField8)
                        .addComponent(tempTextField9)
                        .addComponent(tempTextField10, javax.swing.GroupLayout.DEFAULT_SIZE, 92, Short.MAX_VALUE)
                        .addComponent(tempTextField1, javax.swing.GroupLayout.Alignment.LEADING)
                        .addComponent(tempTextField, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.PREFERRED_SIZE, 62, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addComponent(convertButton1))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(LabelBottom)
                    .addComponent(Client9)
                    .addComponent(Client10)
                    .addComponent(Client8)
                    .addComponent(Client7)
                    .addComponent(Client6)
                    .addComponent(Client5)
                    .addComponent(Client4)
                    .addComponent(Client3)
                    .addComponent(Client2)
                    .addComponent(Client1)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                        .addComponent(LabelTOP)
                        .addComponent(convertButton)))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addComponent(tempTextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(LabelTOP))
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addComponent(tempTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(Client1))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(tempTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(Client2))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(tempTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(Client3))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(tempTextField4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(Client4))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(tempTextField5, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(Client5))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(tempTextField6, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(Client6))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(tempTextField7, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(Client7))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(tempTextField8, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(Client8))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(tempTextField9, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(Client9))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(tempTextField10, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(Client10))
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(convertButton1)
                    .addComponent(convertButton))
                .addGap(27, 27, 27)
                .addComponent(LabelBottom)
                .addContainerGap())
        );

        pack();
    }// </editor-fold>                        

    private void convertButtonActionPerformed(java.awt.event.ActionEvent evt) {                                              


       


        int numberofPrimes = (int) ((Double.parseDouble(tempTextField.getText())));
        NumberofPrimes = numberofPrimes;
        System.out.println(NumberofPrimes);





        String get1 = tempTextField1.getText();
        TempNodes.add(get1);

        String get2 = tempTextField2.getText();
        TempNodes.add(get2);

        String get3 = tempTextField3.getText();
        TempNodes.add(get3);

        String get4 = tempTextField4.getText();
        TempNodes.add(get4);

        String get5 = tempTextField5.getText();
        TempNodes.add(get5);

        String get6 = tempTextField6.getText();
        TempNodes.add(get6);

        String get7 = tempTextField7.getText();
        TempNodes.add(get7);

        String get8 = tempTextField8.getText();
        TempNodes.add(get8);

        String get9 = tempTextField9.getText();
        TempNodes.add(get9);

        String get10 = tempTextField10.getText();
        TempNodes.add(get10);


        for (int i = 0; i < 10; i++) {
            if (!(TempNodes.get(i).equals("0.0.0.0"))) {
                RealNodes.add(TempNodes.get(i));
            }
        }
        if(RealNodes.size()==0) {
            JOptionPane.showMessageDialog(this, "Enter an IP address!");
            System.exit(0);
        }

         try{
		AudioInputStream stream        = AudioSystem.getAudioInputStream(new File("leeroy.wav"));
		AudioFormat format = stream.getFormat();
		DataLine.Info info = new DataLine.Info(Clip.class, stream.getFormat());
		Clip clip = (Clip) AudioSystem.getLine(info);
		 clip.open(stream);
		 clip.start();
	} catch (Exception e)
	{
	 	e.printStackTrace();
	}

        for (int k = 0; k < RealNodes.size(); k++) {
            System.out.println(RealNodes.get(k));
        }
        int count = 0;

        try {
           
           while(true) {
                 sock = serverSock.accept();
                PrintWriter writer = new PrintWriter(sock.getOutputStream());

                if (count < RealNodes.size()) {

                    writer.println(NumberofPrimes / RealNodes.size() + count * NumberofPrimes / RealNodes.size() + " " + (count + 1 * NumberofPrimes / RealNodes.size() - NumberofPrimes / RealNodes.size()));
                    writer.close();
                    count++;


      //             System.out.println(sock.isBound());
         

                Thread readerThread = new Thread(new IncomingReader());
                readerThread.start();






              
           //    writer.close();
                }



                //convertStreamToString(isreader);

         //       String lol = reader.toString();

       //         System.out.println(lol);
           //     writer.close();


            
           }
                



        } catch (IOException ex) {
            ex.printStackTrace();
        }




        //System.out.println(primeGen(NumberofPrimes));

    }                                             

    private void tempTextFieldActionPerformed(java.awt.event.ActionEvent evt) {                                              
    }                                             

    private void tempTextField1ActionPerformed(java.awt.event.ActionEvent evt) {                                               
        // TODO add your handling code here:
    }                                              

    private void tempTextField2ActionPerformed(java.awt.event.ActionEvent evt) {                                               
        // TODO add your handling code here:
    }                                              

    private void tempTextField3ActionPerformed(java.awt.event.ActionEvent evt) {                                               
        // TODO add your handling code here:
    }                                              

    private void tempTextField4ActionPerformed(java.awt.event.ActionEvent evt) {                                               
        // TODO add your handling code here:
    }                                              

    private void tempTextField5ActionPerformed(java.awt.event.ActionEvent evt) {                                               
        // TODO add your handling code here:
    }                                              

    private void tempTextField6ActionPerformed(java.awt.event.ActionEvent evt) {                                               
        // TODO add your handling code here:
    }                                              

    private void tempTextField7ActionPerformed(java.awt.event.ActionEvent evt) {                                               
        // TODO add your handling code here:
    }                                              

    private void tempTextField8ActionPerformed(java.awt.event.ActionEvent evt) {                                               
        // TODO add your handling code here:
    }                                              

    private void tempTextField9ActionPerformed(java.awt.event.ActionEvent evt) {                                               
        // TODO add your handling code here:
    }                                              

    private void tempTextField10ActionPerformed(java.awt.event.ActionEvent evt) {                                                
        // TODO add your handling code here:
    }                                               

    private void convertButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                               

try{
		AudioInputStream stream        = AudioSystem.getAudioInputStream(new File("epiclaugh.wav"));
		AudioFormat format = stream.getFormat();
		DataLine.Info info = new DataLine.Info(Clip.class, stream.getFormat());
		Clip clip = (Clip) AudioSystem.getLine(info);
		 clip.open(stream);
		 clip.start();
	} catch (Exception e)
	{
	 	e.printStackTrace();
	}


    }                                              

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {
                try {
                    new TheGUI().setVisible(true);
                } catch (IOException ex) {
                    Logger.getLogger(TheGUI.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        });
    }
    // Variables declaration - do not modify                     
    private javax.swing.JLabel Client1;
    private javax.swing.JLabel Client10;
    private javax.swing.JLabel Client2;
    private javax.swing.JLabel Client3;
    private javax.swing.JLabel Client4;
    private javax.swing.JLabel Client5;
    private javax.swing.JLabel Client6;
    private javax.swing.JLabel Client7;
    private javax.swing.JLabel Client8;
    private javax.swing.JLabel Client9;
    private javax.swing.JLabel LabelBottom;
    private javax.swing.JLabel LabelTOP;
    private javax.swing.JButton convertButton;
    private javax.swing.JButton convertButton1;
    private javax.swing.JTextField tempTextField;
    private javax.swing.JTextField tempTextField1;
    private javax.swing.JTextField tempTextField10;
    private javax.swing.JTextField tempTextField2;
    private javax.swing.JTextField tempTextField3;
    private javax.swing.JTextField tempTextField4;
    private javax.swing.JTextField tempTextField5;
    private javax.swing.JTextField tempTextField6;
    private javax.swing.JTextField tempTextField7;
    private javax.swing.JTextField tempTextField8;
    private javax.swing.JTextField tempTextField9;
    // End of variables declaration                   

public class IncomingReader implements Runnable {
    public void run() {
        String message;
        String fart = "";
            try {

              [B]  InputStreamReader isreader = new InputStreamReader(sock.getInputStream()); //HERE IS WHER EIT COMPLAINS!

                reader = new BufferedReader(isreader);[/B]  //HERE IS WHER EIT COMPLAINS!

                System.out.println("hi");
                while ((message = reader.readLine()) != null) {
                     System.out.println("read" + message);
                      fart+=message;
                }
                
               
            } catch (IOException ex) {
                ex.printStackTrace();
            }
    }
}
    
}

Client:

Java Code:

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 *
 * @author JigglyWiggly
 */
import java.io.*;
import java.net.*;
import java.util.StringTokenizer;
import javax.swing.JOptionPane;


public class PrimeClient {
    BufferedReader reader;
    PrintWriter writer;
    String numberstocomputeupto="";
    public void go() {
        try {
            String socker = "";
            socker = JOptionPane.showInputDialog("Enter the Server's IP Address");




             Socket s = new Socket("127.0.0.1", 4242);
             InputStreamReader streamReader = new InputStreamReader(s.getInputStream());
             reader = new BufferedReader(streamReader);
             writer = new PrintWriter(s.getOutputStream());



             //Thread readerThread = new Thread (new IncomingReader());
             //readerThread.start();


       numberstocomputeupto = reader.readLine();    
         reader.close();
      //      System.out.println(numberstocomputeupto);
            System.out.println(numberstocomputeupto);
            StringTokenizer st = new StringTokenizer(numberstocomputeupto);
            int first = 0;
            int second = 0;

            first = Integer.parseInt(st.nextToken());
            second = Integer.parseInt(st.nextToken());

            System.out.println("Check");
            System.out.println(first);
            System.out.println(second);

            primeGen(first, second);

        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }

    public void primeGen(int compute, int begin) {

        int i = 0;
        int k = 0;
        int count = 0;
        String total="";
        for (i = begin; i < compute; i++) {
            if (!(i % 2 == 0 && i != 2)) //on purposely confusing
            {
                for (k = 2; k <= i / 2; k++) {
                    if (i % k == 0) {
                        break;
                    }
                }

                if (k > i / 2) {
                    System.out.println(i);
                    total+=i;
                    count++;
                }
            }
        }
        total+=count;
        System.out.println("\nTotal: " + count);


        try {
        writer.println(total);
        writer.close();

     //   reader.close();
        } catch(Exception ex) {
            ex.printStackTrace();
        }
    }

  /*  public class IncomingReader implements Runnable {

        public void run() {
        String message;
        try {
            while((message = reader.readLine()) !=null) {
                System.out.println("read " + message);
               
            }
        } catch(Exception ex) {
            ex.printStackTrace();
        }
        }

    }
*/
    public static void main(String[] args) {
        PrimeClient client = new PrimeClient();
        client.go();
    }

   /*  public class IncomingReader implements Runnable {
        public void run() {
            String message;
            try {
                while ((message = reader.readLine()) != null) {
                    System.out.println("client read " + message);
                    numberstocomputeupto+=reader.readLine();
                }
            } catch (IOException ex)
            {
                ex.printStackTrace();
            }
        }
    }



    * 
    */
}

Error log:

Java Code:

init:
deps-jar:
Deleted 16 out of date files in 0 seconds
Compiling 1 source file to C:\Users\JigglyWiggly\Documents\My Dropbox\Java\PrimeNumberGeneratorCluster\build\classes
Note: C:\Users\JigglyWiggly\Documents\My Dropbox\Java\PrimeNumberGeneratorCluster\src\learn\TheGUI.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
compile-single:
run-single:
1000
127.0.0.1
java.net.SocketException: Socket is closed
        at java.net.Socket.getInputStream(Socket.java:788)
      [B]  at learn.TheGUI$IncomingReader.run(TheGUI.java:559)[/B]
        at java.lang.Thread.run(Thread.java:619)
BUILD STOPPED (total time: 32 seconds)

Why is the socket being closed when I want to open it there? (It shows the error at the end of TheGUI.java (the first long book of code lol)

**jigglywiggly** · 05-25-2010, 01:06 AM

Ok I'll post a much more condensed version, anyone...? I changed the code around a bit...

Java Code:

public class TheGUI extends javax.swing.JFrame {

    int PrimestoCompute = 0;
    int NumberofPrimes = 0;
    LinkedList TempNodes = new LinkedList();
    LinkedList RealNodes = new LinkedList();
    BufferedReader reader;
    ServerSocket serverSock = new ServerSocket(4242);
    Socket sock;
       Thread readerThread = new Thread(new IncomingReader());


    /** Creates new form TheGUI */
    public TheGUI() throws IOException {
        initComponents();
        setTitle("3dslice.net PrimeGen");
        this.setIconImage(Toolkit.getDefaultToolkit().getImage("lolface.jpg"));


    }

 private void convertButtonActionPerformed(java.awt.event.ActionEvent evt) {                                              


       


        int numberofPrimes = (int) ((Double.parseDouble(tempTextField.getText())));
        NumberofPrimes = numberofPrimes;
        System.out.println(NumberofPrimes);





        String get1 = tempTextField1.getText();
        TempNodes.add(get1);

        String get2 = tempTextField2.getText();
        TempNodes.add(get2);

        String get3 = tempTextField3.getText();
        TempNodes.add(get3);

        String get4 = tempTextField4.getText();
        TempNodes.add(get4);

        String get5 = tempTextField5.getText();
        TempNodes.add(get5);

        String get6 = tempTextField6.getText();
        TempNodes.add(get6);

        String get7 = tempTextField7.getText();
        TempNodes.add(get7);

        String get8 = tempTextField8.getText();
        TempNodes.add(get8);

        String get9 = tempTextField9.getText();
        TempNodes.add(get9);

        String get10 = tempTextField10.getText();
        TempNodes.add(get10);


        for (int i = 0; i < 10; i++) {
            if (!(TempNodes.get(i).equals("0.0.0.0"))) {
                RealNodes.add(TempNodes.get(i));
            }
        }
        if(RealNodes.size()==0) {
            JOptionPane.showMessageDialog(this, "Enter an IP address!");
            System.exit(0);
        }

         try{
		AudioInputStream stream        = AudioSystem.getAudioInputStream(new File("leeroy.wav"));
		AudioFormat format = stream.getFormat();
		DataLine.Info info = new DataLine.Info(Clip.class, stream.getFormat());
		Clip clip = (Clip) AudioSystem.getLine(info);
		 clip.open(stream);
		 clip.start();
	} catch (Exception e)
	{
	 	e.printStackTrace();
	}

        for (int k = 0; k < RealNodes.size(); k++) {
            System.out.println(RealNodes.get(k));
        }
        int count = 0;

        try {
          
           


           while(true) {
                 sock = serverSock.accept();
                PrintWriter writer = new PrintWriter(sock.getOutputStream());

                if (count < RealNodes.size()) {

                    writer.println(NumberofPrimes / RealNodes.size() + count * NumberofPrimes / RealNodes.size() + " " + (count + 1 * NumberofPrimes / RealNodes.size() - NumberofPrimes / RealNodes.size()));
                    writer.close();
                    count++;
                  readerThread.start();
                 

      //             System.out.println(sock.isBound());
         

              





              
           //    writer.close();
                }



                //convertStreamToString(isreader);

         //       String lol = reader.toString();

       
           //     writer.close();


     
           }
                



        } catch (IOException ex) {
            ex.printStackTrace();
        }
 public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {
                try {
                    new TheGUI().setVisible(true);
                } catch (IOException ex) {
                    Logger.getLogger(TheGUI.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        });
    }

public class IncomingReader implements Runnable {
    public void run() {
        String message;
        String fart = "";
            try {
             //    sock2 = serverSock.accept();
               // InputStreamReader isreader = new InputStreamReader(sock2.getInputStream());
                //reader = new BufferedReader(isreader);

                
                System.out.println("GOGOGO");
                while ((message = reader.readLine()) != null) {
                      System.out.println("read" + message);
                      fart+=message;
                     
                }
                 reader.close();
               
               
            } catch (IOException ex) {
               ex.printStackTrace();
            }
    }
    }

Here is the output

Java Code:

init:
deps-jar:
Deleted 16 out of date files in 0 seconds
Compiling 1 source file to C:\Users\JigglyWiggly\Documents\My Dropbox\Java\PrimeNumberGeneratorCluster\build\classes
Note: C:\Users\JigglyWiggly\Documents\My Dropbox\Java\PrimeNumberGeneratorCluster\src\learn\TheGUI.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
compile-single:
run-single:
1000
127.0.0.1
GOGOGO
Exception in thread "Thread-2" java.lang.NullPointerException
        at learn.TheGUI$IncomingReader.run(TheGUI.java:568)
        at java.lang.Thread.run(Thread.java:619)

[/code]

It's pointing to when I say while ((message = reader.readLine()) != null) {
And it says nullpointer exception... I mean I understand if there is no data, but like why is it saying this, I am saying if it's not null!

This is driving me bonkers help plz.

**JosAH** · 05-25-2010, 08:10 AM

Originally Posted by jigglywiggly

It's pointing to when I say while ((message = reader.readLine()) != null) {
And it says nullpointer exception... I mean I understand if there is no data, but like why is it saying this, I am saying if it's not null!

The 'reader' itself could be null ...

kind regards,

Jos

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