Why Java JTextArea doesn't receive the entire pasted text?

Using Netbeans 6.8 (Mac Version) drag and drop tool for making the GUI, I have designed a JTextArea which the user should paste his data which the program will modify and show it to him.

It is working fine; however, when I tried to paste about 65 thousand lines of testing data in the JTextArea, the GUI showed only a few of these lines (like 50 or less)... for some reason it refused to paste the entire testing data which I copied from Notepad.

I thought the JTextArea was full or something, but when I tried to type more text manually (after the pasting of the testing data), it was typing and showing in the textbox!

Any idea what is going on?

Update 001

I'm getting the following error

Java.lang.OutOfMemoryError: Java heap spaces

Update 002

package bossconverter;

import org.jdesktop.application.Action;
import org.jdesktop.application.ResourceMap;
import org.jdesktop.application.SingleFrameApplication;
import org.jdesktop.application.FrameView;
import org.jdesktop.application.TaskMonitor;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.Timer;
import javax.swing.Icon;
import javax.swing.JDialog;
import javax.swing.JFrame;

/**
 * The application's main frame.
 */
public class BOSSConverterView extends FrameView {

public BOSSConverterView(SingleFrameApplication app) {
    super(app);

    initComponents();

    // status bar initialization - message timeout, idle icon and busy animation, etc
    ResourceMap resourceMap = getResourceMap();
    int messageTimeout = resourceMap.getInteger("StatusBar.messageTimeout");
    messageTimer = new Timer(messageTimeout, new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            statusMessageLabel.setText("");
        }
    });
    messageTimer.setRepeats(false);
    int busyAnimationRate = resourceMap.getInteger("StatusBar.busyAnimationRate");
    for (int i = 0; i < busyIcons.length; i++) {
        busyIcons[i] = resourceMap.getIcon("StatusBar.busyIcons[" + i + "]");
    }
    busyIconTimer = new Timer(busyAnimationRate, new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            busyIconIndex = (busyIconIndex + 1) % busyIcons.length;
            statusAnimationLabel.setIcon(busyIcons[busyIconIndex]);
        }
    });
    idleIcon = resourceMap.getIcon("StatusBar.idleIcon");
    statusAnimationLabel.setIcon(idleIcon);
    progressBar.setVisible(false);

    // connecting action tasks to status bar via TaskMonitor
    TaskMonitor taskMonitor = new TaskMonitor(getApplication().getContext());
    taskMonitor.addPropertyChangeListener(new java.beans.PropertyChangeListener() {
        public void propertyChange(java.beans.PropertyChangeEvent evt) {
            String propertyName = evt.getPropertyName();
            if ("started".equals(propertyName)) {
                if (!busyIconTimer.isRunning()) {
                    statusAnimationLabel.setIcon(busyIcons[0]);
                    busyIconIndex = 0;
                    busyIconTimer.start();
                }
                progressBar.setVisible(true);
                progressBar.setIndeterminate(true);
            } else if ("done".equals(propertyName)) {
                busyIconTimer.stop();
                statusAnimationLabel.setIcon(idleIcon);
                progressBar.setVisible(false);
                progressBar.setValue(0);
            } else if ("message".equals(propertyName)) {
                String text = (String)(evt.getNewValue());
                statusMessageLabel.setText((text == null) ? "" : text);
                messageTimer.restart();
            } else if ("progress".equals(propertyName)) {
                int value = (Integer)(evt.getNewValue());
                progressBar.setVisible(true);
                progressBar.setIndeterminate(false);
                progressBar.setValue(value);
            }
        }
    });
}

@Action
public void showAboutBox() {
    if (aboutBox == null) {
        JFrame mainFrame = BOSSConverterApp.getApplication().getMainFrame();
        aboutBox = new BOSSConverterAboutBox(mainFrame);
        aboutBox.setLocationRelativeTo(mainFrame);
    }
    BOSSConverterApp.getApplication().show(aboutBox);
}

/** 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() {

    mainPanel = new javax.swing.JPanel();
    jScrollPane1 = new javax.swing.JScrollPane();
    jTextArea1 = new javax.swing.JTextArea();
    jScrollPane2 = new javax.swing.JScrollPane();
    jTextArea2 = new javax.swing.JTextArea();
    jButton1 = new javax.swing.JButton();
    menuBar = new javax.swing.JMenuBar();
    javax.swing.JMenu fileMenu = new javax.swing.JMenu();
    javax.swing.JMenuItem exitMenuItem = new javax.swing.JMenuItem();
    javax.swing.JMenu helpMenu = new javax.swing.JMenu();
    javax.swing.JMenuItem aboutMenuItem = new javax.swing.JMenuItem();
    statusPanel = new javax.swing.JPanel();
    javax.swing.JSeparator statusPanelSeparator = new javax.swing.JSeparator();
    statusMessageLabel = new javax.swing.JLabel();
    statusAnimationLabel = new javax.swing.JLabel();
    progressBar = new javax.swing.JProgressBar();

    mainPanel.setName("mainPanel"); // NOI18N

    jScrollPane1.setName("jScrollPane1"); // NOI18N

    jTextArea1.setColumns(20);
    jTextArea1.setRows(5);
    jTextArea1.setName("jTextArea1"); // NOI18N
    jScrollPane1.setViewportView(jTextArea1);

    jScrollPane2.setName("jScrollPane2"); // NOI18N

    jTextArea2.setColumns(20);
    jTextArea2.setRows(5);
    jTextArea2.setName("jTextArea2"); // NOI18N
    jScrollPane2.setViewportView(jTextArea2);

    org.jdesktop.application.ResourceMap resourceMap =
                org.jdesktop.application.Application.getInstance
                  (bossconverter.BOSSConverterApp.class).getContext()
                  .getResourceMap(BOSSConverterView.class);
    jButton1.setText(resourceMap.getString("jButton1.text")); // NOI18N
    jButton1.setName("jButton1"); // NOI18N
    jButton1.addMouseListener(new java.awt.event.MouseAdapter() {
        public void mouseClicked(java.awt.event.MouseEvent evt) {
            tester(evt);
        }
    });

    org.jdesktop.layout.GroupLayout mainPanelLayout =
                 new org.jdesktop.layout.GroupLayout(mainPanel);
    mainPanel.setLayout(mainPanelLayout);
    mainPanelLayout.setHorizontalGroup(
        mainPanelLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
        .add(mainPanelLayout.createSequentialGroup()
            .addContainerGap()
            .add(mainPanelLayout.createParallelGroup(org.jdesktop.layout
                                                     .GroupLayout.LEADING)
                .add(jScrollPane1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE,
                     383, Short.MAX_VALUE)
                .add(jScrollPane2, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE,
                     383, Short.MAX_VALUE)
                .add(org.jdesktop.layout.GroupLayout.TRAILING, jButton1))
            .addContainerGap())
    );
    mainPanelLayout.setVerticalGroup(
        mainPanelLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
        .add(mainPanelLayout.createSequentialGroup()
            .addContainerGap()
            .add(jScrollPane1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE,
                 98, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
            .add(18, 18, 18)
            .add(jScrollPane2, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE,
                 97, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(org.jdesktop.layout.LayoutStyle.UNRELATED)
            .add(jButton1)
            .addContainerGap(22, Short.MAX_VALUE))
    );

    menuBar.setName("menuBar"); // NOI18N

    fileMenu.setText(resourceMap.getString("fileMenu.text")); // NOI18N
    fileMenu.setName("fileMenu"); // NOI18N

    javax.swing.ActionMap actionMap = org.jdesktop.application.Application
                                      .getInstance(bossconverter.BOSSConverterApp
                                      .class).getContext().getActionMap
                                      (BOSSConverterView.class, this);
    exitMenuItem.setAction(actionMap.get("quit")); // NOI18N
    exitMenuItem.setName("exitMenuItem"); // NOI18N
    fileMenu.add(exitMenuItem);

    menuBar.add(fileMenu);

    helpMenu.setText(resourceMap.getString("helpMenu.text")); // NOI18N
    helpMenu.setName("helpMenu"); // NOI18N

    aboutMenuItem.setAction(actionMap.get("showAboutBox")); // NOI18N
    aboutMenuItem.setName("aboutMenuItem"); // NOI18N
    helpMenu.add(aboutMenuItem);

    menuBar.add(helpMenu);

    statusPanel.setName("statusPanel"); // NOI18N

    statusPanelSeparator.setName("statusPanelSeparator"); // NOI18N

    statusMessageLabel.setName("statusMessageLabel"); // NOI18N

    statusAnimationLabel.setHorizontalAlignment(javax.swing.SwingConstants.LEFT);
    statusAnimationLabel.setName("statusAnimationLabel"); // NOI18N

    progressBar.setName("progressBar"); // NOI18N

    org.jdesktop.layout.GroupLayout statusPanelLayout = new org.jdesktop.layout
                                                        .GroupLayout(statusPanel);
    statusPanel.setLayout(statusPanelLayout);
    statusPanelLayout.setHorizontalGroup(
        statusPanelLayout.createParallelGroup(org.jdesktop.layout.GroupLayout
                                              .LEADING)
        .add(statusPanelSeparator, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE,
             423, Sh开发者_运维问答ort.MAX_VALUE)
        .add(statusPanelLayout.createSequentialGroup()
            .addContainerGap()
            .add(statusMessageLabel)
            .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED, 227,
                             Short.MAX_VALUE)
            .add(progressBar, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE,
                 org.jdesktop.layout.GroupLayout.DEFAULT_SIZE,
                 org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
            .add(statusAnimationLabel)
            .addContainerGap())
    );
    statusPanelLayout.setVerticalGroup(
        statusPanelLayout.createParallelGroup(org.jdesktop.layout.GroupLayout
                                              .LEADING)
        .add(statusPanelLayout.createSequentialGroup()
            .add(statusPanelSeparator, org.jdesktop.layout.GroupLayout
                 .PREFERRED_SIZE, 2, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED,
                             org.jdesktop.layout.GroupLayout.DEFAULT_SIZE,
                             Short.MAX_VALUE)
            .add(statusPanelLayout.createParallelGroup(org.jdesktop.layout
                                                       .GroupLayout.BASELINE)
                .add(statusMessageLabel)
                .add(statusAnimationLabel)
                .add(progressBar, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE,
                     org.jdesktop.layout.GroupLayout.DEFAULT_SIZE,
                     org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
            .add(3, 3, 3))
    );

    setComponent(mainPanel);
    setMenuBar(menuBar);
    setStatusBar(statusPanel);
}// </editor-fold>

private void tester(java.awt.event.MouseEvent evt) {

    Converter converter = new Converter();
    jTextArea2.setText(converter.fixParsedParagraph (jTextArea1.getText()) );
}

// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JScrollPane jScrollPane2;
private javax.swing.JTextArea jTextArea1;
private javax.swing.JTextArea jTextArea2;
private javax.swing.JPanel mainPanel;
private javax.swing.JMenuBar menuBar;
private javax.swing.JProgressBar progressBar;
private javax.swing.JLabel statusAnimationLabel;
private javax.swing.JLabel statusMessageLabel;
private javax.swing.JPanel statusPanel;
// End of variables declaration

private final Timer messageTimer;
private final Timer busyIconTimer;
private final Icon idleIcon;
private final Icon[] busyIcons = new Icon[15];
private int busyIconIndex = 0;

private JDialog aboutBox;
}

This is the code which was generated automatically by netbeans for my GUI.

So is there something that need to be fixed in it?

The Java Virtual Machine takes two command line arguments which set the initial and maximum heap sizes:

-Xms and -Xmx. For example if you want to give your Java program a 64Mb initial and 256Mb maximum heap size you could launch it as follows:

java -Xms64m -Xmx256m my_prog

Here's an example I made like the tutorial. With enough heap space, I can paste more than 200,000 lines. Are you maybe missing an exception on the event queue?

import javax.swing.*;
import java.awt.*;

public class JTextAreaPasteTest {

    private String testStr = "Paste text here.";

    public static void main(String argv[]) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                new JTextAreaPasteTest();
            }
        });
    }

    public JTextAreaPasteTest () {
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JDialog.EXIT_ON_CLOSE);
        PasteArea wrapArea = new PasteArea("Paste text here.");
        frame.setLayout(new FlowLayout());
        frame.add(new JScrollPane(wrapArea));
        frame.pack();
        frame.setVisible(true);
    }

    private static class PasteArea extends JTextArea {

        public PasteArea(String str) {
            super(str, 20, 40);
            this.setLineWrap(true);
            this.setWrapStyleWord(true);
            this.setCaretPosition(str.length());
        }
    }
}