既是applet又是application的java程序的关闭问题。
有一个既是applet又是application的java程序，当作为application运行时，点击windows窗口的X时，并不能关闭程序，而只能关闭进程，添加什么语句可以使用windows的X关闭程序呢？
代码如下：
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
/**
* <p> Title: </p>
* <p> Description: </p>
* <p> Copyright: Copyright (c) 2006 </p>
* <p> Company: </p>
* @author not attributable
* @version 1.0
*/
public class Applet1 extends Applet {
private boolean isStandalone = false;
JTabbedPane stradacTab = new JTabbedPane();
JPanel jPanel1 = new JPanel();
JPanel jPanel2 = new JPanel();
JScrollPane jScrollPane1 = new JScrollPane();
JTextField jTextField1 = new JTextField();
JComboBox jComboBox1 = new JComboBox();
JTextPane jTextPane1 = new JTextPane();
JButton jButton1 = new JButton();
JTextArea jTextArea1 = new JTextArea();
JToggleButton jToggleButton1 = new JToggleButton();
JButton jButton2 = new JButton();
JTextArea jTextArea2 = new JTextArea();
JEditorPane jEditorPane1 = new JEditorPane();
//Get a parameter value
public String getParameter(String key, String def) {
return isStandalone ? System.getProperty(key, def) :
(getParameter(key) != null ? getParameter(key) : def);
}
//Construct the applet
public Applet1() {
}
//Initialize the applet
public void init() {
try {
jbInit();
}
catch(Exception e) {
e.printStackTrace();
}
}
//Component initialization
private void jbInit() throws Exception {
this.setLayout(null);
stradacTab.setBounds(new Rectangle(40, 18, 317, 260));
jPanel1.setBounds(new Rectangle(6, 51, 31, 52));
jPanel1.setLayout(null);
jPanel2.setBounds(new Rectangle(1, 129, 38, 87));
jButton1.setBounds(new Rectangle(56, 143, 93, 47));
jButton1.setText( "jButton1 ");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(ActionEvent e) {
jButton1_actionPerformed(e);
}
});
jButton2.setText( "jButton2 ");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(ActionEvent e) {
jButton2_actionPerformed(e);
}
});
jPanel1.add(jButton1, null);
jPanel2.add(jButton2, null);
this.add(stradacTab, null);
stradacTab.add( "druhy ",jPanel2);
stradacTab.add( "prvni ",jPanel1);
stradacTab.addChangeListener(new ChangeListener() {
public void stateChanged(ChangeEvent e) {
int index = stradacTab.getSelectedIndex();
String title = stradacTab.getTitleAt(index);
System.out.println( "index = " +
index);
System.out.println( "title = " +
title);
}
});
}
//Start the applet
public void start() {
}
//Stop the applet
public void stop() {
}
//Destroy the applet
public void destroy() {
}
//Get Applet information
public String getAppletInfo() {
return "Applet Information ";
}
//Get parameter info
public String[][] getParameterInfo() {
return null;
}
//Main method
public static void main(String[] args) {
Applet1 applet = new Applet1();
applet.isStandalone = true;
Frame frame;
frame = new Frame();
frame.setTitle( "Applet Frame ");
frame.add(applet, BorderLayout.CENTER);
applet.init();
applet.start();
frame.setSize(400,320);
Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
frame.setLocation((d.width - frame.getSize().width) / 2, (d.height - frame.getSize().height) / 2);
frame.setVisible(true);
}
void jButton2_actionPerformed(ActionEvent e) {
stradacTab.setSelectedIndex(1);
}
void jButton1_actionPerformed(ActionEvent e) {
stradacTab.setSelectedIndex(0);
}
}
[解决办法]
使用JFrame：
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.JFrame;
/**
* <p> Title: </p>
* <p> Description: </p>
* <p> Copyright: Copyright (c) 2006 </p>
* <p> Company: </p>
* @author not attributable
* @version 1.0
*/
public class Applet1 extends Applet {
private boolean isStandalone = false;
JTabbedPane stradacTab = new JTabbedPane();
JPanel jPanel1 = new JPanel();
JPanel jPanel2 = new JPanel();
JScrollPane jScrollPane1 = new JScrollPane();
JTextField jTextField1 = new JTextField();
JComboBox jComboBox1 = new JComboBox();
JTextPane jTextPane1 = new JTextPane();
JButton jButton1 = new JButton();
JTextArea jTextArea1 = new JTextArea();
JToggleButton jToggleButton1 = new JToggleButton();
JButton jButton2 = new JButton();
JTextArea jTextArea2 = new JTextArea();
JEditorPane jEditorPane1 = new JEditorPane();
//Get a parameter value
public String getParameter(String key, String def) {
return isStandalone ? System.getProperty(key, def) :
(getParameter(key) != null ? getParameter(key) : def);
}
//Construct the applet
public Applet1() {
}
//Initialize the applet
public void init() {
try {
jbInit();
}
catch(Exception e) {
e.printStackTrace();
}
}
//Component initialization
private void jbInit() throws Exception {
this.setLayout(null);
stradacTab.setBounds(new Rectangle(40, 18, 317, 260));
jPanel1.setBounds(new Rectangle(6, 51, 31, 52));
jPanel1.setLayout(null);
jPanel2.setBounds(new Rectangle(1, 129, 38, 87));
jButton1.setBounds(new Rectangle(56, 143, 93, 47));
jButton1.setText( "jButton1 ");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(ActionEvent e) {
jButton1_actionPerformed(e);
}
});
jButton2.setText( "jButton2 ");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(ActionEvent e) {
jButton2_actionPerformed(e);
}
});
jPanel1.add(jButton1, null);
jPanel2.add(jButton2, null);
this.add(stradacTab, null);
stradacTab.add( "druhy ",jPanel2);
stradacTab.add( "prvni ",jPanel1);
stradacTab.addChangeListener(new ChangeListener() {
public void stateChanged(ChangeEvent e) {
int index = stradacTab.getSelectedIndex();
String title = stradacTab.getTitleAt(index);
System.out.println( "index = " +
index);
System.out.println( "title = " +
title);
}
});
}
protected void processWindowEvent(WindowEvent e) {
System.out.print( "hello ");
System.exit(0);
}
//Start the applet
public void start() {
}
//Stop the applet
public void stop() {
}
//Destroy the applet
public void destroy() {
}
//Get Applet information
public String getAppletInfo() {
return "Applet Information ";
}
//Get parameter info
public String[][] getParameterInfo() {
return null;
}
//Main method
public static void main(String[] args) {
Applet1 applet = new Applet1();
applet.isStandalone = true;
JFrame frame;
frame = new JFrame();
frame.setTitle( "Applet Frame ");
frame.getContentPane().add(applet, BorderLayout.CENTER);
applet.init();
applet.start();
frame.setSize(400,320);
Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
frame.setLocation((d.width - frame.getSize().width) / 2, (d.height - frame.getSize().height) / 2);
frame.setVisible(true);
//frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
}
void jButton2_actionPerformed(ActionEvent e) {
stradacTab.setSelectedIndex(1);
}
void jButton1_actionPerformed(ActionEvent e) {
stradacTab.setSelectedIndex(0);
}
}
[解决办法]
好吧，只解决你退出问题
JFrame f=new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);