lineSeparator in textArea

[ostkanten]

The following code work with two exceptions:

1. The lineSeparator in the textArea doesn´t work. I have tried "textArea.append(read + lineTerminator);" but then nothing is written in the textArea.

2. I don´t know how I can add several inputs without restart the javafile. I think I have to put another ActionListener somewhere, but where?

import java.awt.*;   
import java.awt.event.*;  
import javax.swing.*;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.BufferedReader;
import java.io.FileWriter;
import java.io.IOException;

 public class ReadWriteTextFile extends JFrame  {   
	 // Data members
	 private static JTextField inputLine;   
     private static JButton button;  
     private static JTextArea textArea;
     private BufferedReader in;
     private BufferedWriter out; 
     private static final String EMPTY_STRING = "";
     private static String lineTerminator = System.getProperty("line.separator");
     private int numberOfLines=50;
     private String read;
     
     // Constructor
     public ReadWriteTextFile() throws IOException  
     {  
         setTitle("Skriv text till fil");  
         setSize(300,400);   
         setLayout(new FlowLayout());   
         inputLine = new JTextField();  
         inputLine.setColumns(25);
         button = new JButton("Klicka här"); 
         textArea = new JTextArea(20,50);
         add(inputLine);  
         add(button); 
         add(textArea);
    
         // stänger systemet när fönstret stängs
         addWindowListener(new WindowAdapter()   
         {   
            public void windowClosing(WindowEvent e)   
             {   
                System.exit(0);   
             }   
         });  

         // reagerar på knapptrycksningsevent
         button.addActionListener(new ActionListener()   
         {   
             public void actionPerformed(ActionEvent event)  
            {     
            	 // kod för att skriva text till filen
            	 try {  
            		out = new BufferedWriter(new FileWriter("C:/Users/Gunilla/Documents/My Dropbox/Javakurs2/Bokexempel/src/test.txt",true)); 
                 	out.write(inputLine.getText());  
             		out.newLine();
             		out.close();  
                 	}
               	catch(IOException e){  
               			System.out.println("There was a problem:" + e);  
               	} 
            	 
            	 // kod för att läsa text från filen
            	 try {  
            		   in = new BufferedReader(new FileReader("C:/Users/Gunilla/Documents/My Dropbox/Javakurs2/Bokexempel/src/test.txt"));  
                            while(numberOfLines > 0){  
                             	read = in.readLine();  
                            	System.out.println("file output: " + read); 
                            	textArea.append(read);
                            	numberOfLines--; 
                            	inputLine.setText("");
                        }  
                         in.close();  
            	   		}catch(IOException e){  
            	   			System.out.println("There was a problem:" + e);  
            	   		} 
            	  }
         });  
   }  

     // Main-metod
    public static void main(String[] args) throws IOException   
     {   
    	ReadWriteTextFile guiInterface = new ReadWriteTextFile();   
        guiInterface.setVisible(true);  
    }  
 }

[jitu.ideas2it]

String textarea = textComments.getText();
int index = textarea.firstIndexOf( CHR(10) );


Then I'd split the text and create a new string with the \n character.

[jitu.ideas2it]

textArea.append(read); Instead Of That Use String Buffer And Append The Text Then String Buffer U Can Set For The TextArea Try Like This