使用Netbeans 6.8（Mac版）拖放工具制作GUI，我设计了一个JTextArea，用户应该粘贴他的数据，程序将修改并显示给他。
工作正常;然而，当我试图在JTextArea中粘贴大约65,000行测试数据时，GUI只显示了这些行中的一些（如50或更少）......由于某种原因，它拒绝粘贴我复制的整个测试数据来自记事本。
我认为JTextArea已经满了，但是当我尝试手动输入更多文本时（在粘贴测试数据之后），它正在输入并显示在文本框中！
知道发生了什么事吗？
更新001
我收到以下错误
Java.lang.OutOfMemoryError: Java heap spaces
更新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, Short.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;
}
这是netbeans为我的GUI自动生成的代码。
那么有什么东西需要修复吗？
答案 0 :(得分：1)
这是我做的tutorial的例子。有足够的堆空间，我可以粘贴超过200,000行。您是否可能在事件队列中遗漏了异常？
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());
}
}
}
答案 1 :(得分：1)
Java虚拟机采用两个命令行参数来设置初始和最大堆大小：
-Xms和-Xmx。例如，如果要为Java程序提供64Mb初始堆和256Mb最大堆大小，可以按如下方式启动它：
java -Xms64m -Xmx256m my_prog