java中窗体的关闭代码 java中设置窗口的关闭按钮

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

}

}

}

相关问答

Q1: 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

Q2: java程序关闭窗口代码

import java.applet.*;

import java.awt.Color;

import java.awt.Frame;

import javax.swing.JFrame;

import java.awt.event.*;

public class FirstFrame extends Frame {

public static void main(String args[]) {

FirstFrame fr = new FirstFrame("First contianer!");

fr.setSize(240, 240);

//继承JFrame的关闭窗口代码

//fr.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

//继承Frame的

fr.addWindowListener(new WindowAdapter() {    

    public void windowClosing(WindowEvent e) {        

        System.exit(0);//退出系统   

    }

});

fr.setVisible(true);

}

public FirstFrame(String str) {

super(str);

}

}

Q3: JAVA中怎么关闭一个窗口

java关闭窗口可以使用dispose()java中窗体的关闭代码，只是该窗体在内存中所占有的资源得到了释放java中窗体的关闭代码，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。

java中窗体的关闭代码的介绍就聊到这里吧，感谢你花时间阅读本站内容，更多关于java中设置窗口的关闭按钮、java中窗体的关闭代码的信息别忘了在本站进行查找喔。