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java窗体程序关闭代码 关闭窗口代码java
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JAVA如何用按钮关闭窗体
很久没有用过界面编程了,就当复习一下了,哈哈
如一楼所说的,给按钮加一个监听器ActionListener,写一个实现方法
actionPerformed.此时当按钮点击时会调用actionPerformed方法,代码如下:
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Close extends JFrame implements ActionListener{
JButton close;
public Close(){
close = new JButton("close");//增加一个按钮
add(close);
close.addActionListener(this);//给按钮增加一个监听器
setLayout(new FlowLayout());
setSize(200,100);
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
//捕捉到按钮点击时的事件处理方法
//按钮点击时一定会自动执行actionPerformed(ActionEvent e)方法
public void actionPerformed(ActionEvent e){
//关闭整个应用程序.如果只是是想关闭当前窗口,可以用
//dispose();
System.exit(0);
}
public static void main(String[] args){
new Close();
}
}
相关问答
Q1: Java jframe中如何实现窗口的关闭
效果图
参考代码和注释如下
import java.awt.event.*;
import javax.swing.*;
public class DemoFrame extends JFrame{
JButton jbExit;
public DemoFrame() {
jbExit = new JButton("退出");
//当点击退出 按钮时候的响应器
jbExit.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
doExit();//退出时候的方法
}
});
JPanel jp = new JPanel();
jp.add(jbExit);
add(jp);
setTitle("窗口");// 窗口标题
setSize(380, 185);// 窗口大小
setLocationRelativeTo(null);// 窗口居中
//setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//通常添加这行代码,点击窗口右下角的关闭时会结束程序
setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);//右下角的关闭,不主动采取任何行动
//当点击窗口右上角的关闭按钮时候的响应器
addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
doExit();
}
});
}
// main方法
public static void main(String[] args) {
new DemoFrame().setVisible(true);
}
//退出时候的选择
private void doExit() {
int n = JOptionPane.showConfirmDialog(null, "你确定要退出吗?", "消息提示",JOptionPane.YES_NO_OPTION);
//取消选择是 -1 ,确定是0 ,取消是1
System.out.println(n);
if(n==0) { //如果选择了确定
System.exit(0);//那么退出
}
}
}
Q2: java关闭窗体的六种方法
前段时间集中精力写了两篇论文 很久没写博文了 现在继续了
使用JFrame的enableEvents和processWindowEvent
//Frame java
import java awt *;
import java awt event *;
import javax swing *;
public class Frame extends JFrame {
public Frame () {
enableEvents(AWTEvent WINDOW_EVENT_MASK);
this setSize(new Dimension( ));
this setTitle( Frame );
}
protected void processWindowEvent(WindowEvent e) {
super processWindowEvent(e);
if (e getID() == WindowEvent WINDOW_CLOSING) {
System exit( );
}
}
}
直接实现WindowListener接口
//Frame java
import java awt *;
import java awt event *;
public class Frame extends Frame implements WindowListener {
public Frame () {
this setSize(new Dimension( ));
this setTitle( Frame );
this addWindowListener(this);
}
public void windowClosing(WindowEvent windowEvent) {
System exit( );
}
public void windowOpened(WindowEvent windowEvent) { }
public void windowClosed(WindowEvent windowEvent) { }
public void windowIconified(WindowEvent windowEvent) { }
public void windowDeiconified(WindowEvent windowEvent) { }
public void windowActivated(WindowEvent windowEvent) { }
public void windowDeactivated(WindowEvent windowEvent) { }
}
直接继承窗体适配器WindowAdapter
//Frame java
import java awt *;
import java awt event *;
public class Frame extends WindowAdapter {
public Frame () {
Frame f=new Frame();
f setSize(new Dimension( ));
f setTitle( Frame );
f addWindowListener(this);
f setVisible(true);
}
public static void main(String[] s){
new Frame ();
}
public void windowClosing(WindowEvent windowEvent) {
System exit( );
}
}
间接继承窗体适配器WindowAdapter
//Frame java
import java awt *;
import java awt event *;
public class Frame extends Frame {
public Frame () {
this setSize(new Dimension( ));
this setTitle( Frame );
this addWindowListener(new winAdapter());
this setVisible(true);
}
public static void main(String[] s){
new Frame ();
}
}
class winAdapter extends WindowAdapter{
public void windowClosing(WindowEvent windowEvent) {
System exit( );
}
}
间接实现WindowListener接口
//Frame java
import java awt *;
import java awt event *;
public class Frame extends Frame {
public Frame () {
this setSize(new Dimension( ));
this setTitle( Frame );
this addWindowListener(new winEventHandle());
this setVisible(true);
}
public static void main(String[] s){
new Frame ();
}
}
class winEventHandle implements WindowListener {
public void windowClosing(WindowEvent windowEvent) {
System exit( );
}
public void windowOpened(WindowEvent windowEvent) { }
public void windowClosed(WindowEvent windowEvent) { }
public void windowIconified(WindowEvent windowEvent) { }
public void windowDeiconified(WindowEvent windowEvent) { }
public void windowActivated(WindowEvent windowEvent) { }
public void windowDeactivated(WindowEvent windowEvent) { }
}
使用Inner Class
//Frame java
import java awt *;
import java awt event *;
public class Frame {
public Frame (){
Frame f=new Frame();
f addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
System exit( );
}
});
f setSize(new Dimension( ));
f setVisible(true);
}
public static void main(String[] s){
new Frame ();
}
}
Jframe的关闭方法
setDefaultCloseOperation(EXIT_ON_CLOSE);
frame的关闭方法如下
this addWindowListener(new java awt event WindowAdapter() {
public void windowClosing(java awt event WindowEvent e) {
System exit( );
}
lishixinzhi/Article/program/Java/hx/201311/27073
Q3: java,swing编程中如何关闭窗体，而不是退出程序！
// register.addActionListener(new AbstractAction() { 再这一行前加下面一下
JFrame f = this;
// 里面这样写
f.setVisible(false);
Q4: java关闭当前窗口代码
方法一：
类 JFrame
javax.swing.JFrame
JFrame中的方法void setDefaultCloseOperation（int）可以设置
以下为改方法的用法：
setDefaultCloseOperation
public void setDefaultCloseOperation(int operation)设置用户在此窗体上发起
"close" 时默认执行的操作。必须指定以下选项之一：
DO_NOTHING_ON_CLOSE（在 WindowConstants 中定义）：不执行任何操作；要求程序在已注册的
WindowListener 对象的 windowClosing 方法中处理该操作。
HIDE_ON_CLOSE（在 WindowConstants 中定义）：调用任意已注册的 WindowListener
对象后自动隐藏该窗体。
DISPOSE_ON_CLOSE（在 WindowConstants 中定义）：调用任意已注册 WindowListener
的对象后自动隐藏并释放该窗体。
EXIT_ON_CLOSE（在 JFrame 中定义）：使用 System exit
方法退出应用程序。仅在应用程序中使用。
默认情况下，该值被设置为 HIDE_ON_CLOSE。更改此属性的值将导致激发属性更改事件，其属性名称为
"defaultCloseOperation"。
注：当 Java 虚拟机 (VM) 中最后一个可显示窗口被释放后，虚拟机可能会终止
要实现你说的，应该采用
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
方法二：
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
public class Test extends JFrame {
public Test(){
this.setTitle("title");
this.setSize(300,200);
this.setLocation(100,100);
//设置关闭时什么也不做
this.setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
//监听关闭按钮的点击操作
this.addWindowListener(new WindowAdapter(){
//new 一个WindowAdapter 类 重写windowClosing方法
//WindowAdapter是个适配器类 具体看jdk的帮助文档
public void windowClosing(WindowEvent e) {
//这里写对话框
if(JOptionPane.showConfirmDialog(null,
"退出","提
示",JOptionPane.YES_NO_OPTION,JOptionPane.QUESTION_MESSAGE)==JOptionPane.YES_OPTION){
System.exit(0);
}
}
});
this.setVisible(true);
}
public static void main(String[] args) {
new Test();
}
}
Q5: JAVA中怎么关闭一个窗口
java关闭窗口可以使用dispose()，只是该窗体在内存中所占有的资源得到了释放，而整个程序并没有因此而退出，如果整个程序要退出，在以java.awt中的frame为控件时，需手动添加：System.exit();
而在以javax.Swing中的jFrame为控件时，一般不需要再写相应的事件，默认点击窗体上的小叉时，是隐藏，当然你可更改其参数。
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