Netbeans GUI questions

[Chuklol]

Hello im new to netbeans so i was following this tutorial on creating a simple calculator Java #N3 - Making a GUI in NetBeans - YouTube

So at the moment i have my main class and my form class.

Currently i am trying to implement a method when one of the buttons are pressed in my GUI.

I cannot figure out how i can call methods from the main class, when the method

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

is used in the form.

What do i need to do so it can see/call the methods from the main?

[Fubarable]

Let's see your whole program.

[Chuklol]

Main Class

import java.io.*;
import java.util.Scanner;
import java.lang.String.*;
import java.util.StringTokenizer;


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

/**
 *
 * @author Eric
 */
public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        AVLForm form = new AVLForm ();
        form.setVisible(true);
        
        // TODO code application logic here
    }
    
    public void LoadData() {
        
        StringTokenizer st;
        String 		str = "";
        try{
            // Open the file that is the first 
            FileInputStream fstream = new FileInputStream("data.txt");
            // Get the object of DataInputStream
            DataInputStream in = new DataInputStream(fstream);
            BufferedReader br = new BufferedReader(new InputStreamReader(in));
            String strLine;
            //Read File Line By Line
            while((strLine = br.readLine()) != null)                
		str = (Tokenize(strLine));
            //Close the input stream
            in.close();						
	}catch (Exception e){//Catch exception if any
            System.err.println("Error: " + e.getMessage());
	}
	st = new StringTokenizer(str," ");
	String s;
	
	// BST insertion
	while(st.hasMoreTokens()){
            s = st.nextToken();		
            // Insert it into an AVL tree
            //first = Insert(s,first);				
	}
    }
            
        
            
        					
		
    
    public String Tokenize(String abc) {
	int i,j;
	String s="";
	i=0;
	while (i<abc.length()){
            if (abc.charAt(i)==',')
		s = s + "";
	else if (abc.charAt(i)=='.')
            s = s + "";
	else 
            s = s + abc.charAt(i);
	i++;				
        }
	return s;		
    }
    
    
    
    
    
}

AVLForm

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

/*
 * AVLForm.java
 *
 * Created on Nov 12, 2011, 2:22:52 PM
 */
/**
 *
 * @author Eric
 */
import java.io.*;
import java.lang.String.*;
import java.util.StringTokenizer;

public class AVLForm extends javax.swing.JFrame {

    /** Creates new form AVLForm */
    public AVLForm() {
        initComponents();
    }

    /** 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.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        jPanel1 = new javax.swing.JPanel();
        loadBut = new javax.swing.JButton();
        isAVLBut = new javax.swing.JButton();
        isBSTBut = new javax.swing.JButton();
        deleteBut = new javax.swing.JButton();
        insertBut = new javax.swing.JButton();
        printBut = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("AVL Trees");

        loadBut.setText("Load Tree");
        loadBut.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                loadButActionPerformed(evt);
            }
        });

        isAVLBut.setText("isAVL");

        isBSTBut.setText("isBST");

        deleteBut.setText("Delete");

        insertBut.setText("Insert");

        printBut.setText("Print");

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(deleteBut)
                        .addGap(18, 18, 18)
                        .addComponent(isAVLBut))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(insertBut)
                        .addGap(18, 18, 18)
                        .addComponent(isBSTBut))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(loadBut)
                        .addGap(18, 18, 18)
                        .addComponent(printBut)))
                .addContainerGap())
        );

        jPanel1Layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {deleteBut, insertBut, isAVLBut, isBSTBut, loadBut, printBut});

        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(loadBut)
                    .addComponent(printBut))
                .addGap(18, 18, 18)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(insertBut)
                    .addComponent(isBSTBut))
                .addGap(18, 18, 18)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(deleteBut)
                    .addComponent(isAVLBut))
                .addContainerGap())
        );

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(98, 98, 98)
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(102, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(92, 92, 92)
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addGap(103, 103, 103))
        );

        pack();
    }// </editor-fold>
// Insert Method
private void loadButActionPerformed(java.awt.event.ActionEvent evt) {
        
    StringTokenizer st;
    String str = "";
    try {
        // Open the file that is the first 
        FileInputStream fstream = new FileInputStream("data.txt");
        // Get the object of DataInputStream
        DataInputStream in = new DataInputStream(fstream);
        BufferedReader br = new BufferedReader(new InputStreamReader(in));
        String strLine;
        //Read File Line By Line
        while ((strLine = br.readLine()) != null) {
            str = (Tokenize(strLine));
        }
        //Close the input stream
        in.close();
    } catch (Exception e) {//Catch exception if any
        System.err.println("Error: " + e.getMessage());
    }
    st = new StringTokenizer(str, " ");
    String s;

    // BST insertion
    while (st.hasMoreTokens()) {
        s = st.nextToken();
        // Insert it into an AVL tree
        //first = Insert(s,first);				
    }



    // TODO add your handling code here:
}
    public String Tokenize(String abc) {
        int i, j;
        String s = "";
        i = 0;
        while (i < abc.length()) {
            if (abc.charAt(i) == ',') {
                s = s + "";
            } else if (abc.charAt(i) == '.') {
                s = s + "";
            } else {
                s = s + abc.charAt(i);
            }
            i++;
        }
        return s;
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(AVLForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(AVLForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(AVLForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(AVLForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {
                new AVLForm().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify
    private javax.swing.JButton deleteBut;
    private javax.swing.JButton insertBut;
    private javax.swing.JButton isAVLBut;
    private javax.swing.JButton isBSTBut;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JButton loadBut;
    private javax.swing.JButton printBut;
    // End of variables declaration
}

Line 125 of the second code is what i want to call into my main method to take a data file input, tokenize it up so i can insert each string into an AVL tree

[Fubarable]

You could give the GUI class a Main field, say called "main", and then alter the GUI's constructor to take a Main parameter and then have the main field refer to the parameter. Then inside of your button's actionPerformed method, you can call methods on the main field.

[Chuklol]

could you possibly explain what you mean or show me the code?