Question

JAVA关于JFrame窗口的关闭问题

我做了3个JFrame框架，分别放在三个类里。在第一个框架（主界面）设置了两个按钮，分别实现点击可弹出另外两个框架界面。可是我只要关闭其中任何一个框架（关闭方式设置为Exit—on——close），整个程序就直接结束了。我想实现点击关闭另外两个框架界面时仅仅只是关闭的那个框架消失，即我不关闭主界面整个程序就不会结束，应该怎么做？
感谢您的指导

Answer 1

重点地是窗体弹出类：WindowsCenter.java
文件一父窗文件名Frame3.java

package untitled1;

import java.awt.BorderLayout;

import javax.swing.JFrame;
import javax.swing.JButton;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class Frame3 extends JFrame {
JButton jButton1 = new JButton();

public Frame3() {
try {
jbInit();
} catch (Exception exception) {
exception.printStackTrace();
}
}

private void jbInit() throws Exception {
getContentPane().setLayout(null);
setSize(400,400);
jButton1.setBounds(new Rectangle(86, 125, 186, 52));
jButton1.setText("点击弹出一个窗口");
jButton1.addActionListener(new Frame3_jButton1_actionAdapter(this));
this.getContentPane().add(jButton1, null);
}

public void jButton1_actionPerformed(ActionEvent e) {
this.dispose();//释放当前窗口
WindowsCenter.Center(new Frame2());//弹出第三个窗口
}
public static void main (String[] args)
{
WindowsCenter.Center(new Frame3());//弹出主窗口
}

}

class Frame3_jButton1_actionAdapter implements ActionListener {
private Frame3 adaptee;
Frame3_jButton1_actionAdapter(Frame3 adaptee) {
this.adaptee = adaptee;
}

public void actionPerformed(ActionEvent e) {
adaptee.jButton1_actionPerformed(e);
}
}

//要弹出的子窗口文件名：Frame2.java

package untitled1;

import java.awt.*;
import javax.swing.*;
import java.awt.Rectangle;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

public class Frame2 extends JFrame
{
private JButton jButton1=new JButton();

public Frame2 ()
{
try {
jbInit();
}
catch(Exception exception) {
exception.printStackTrace();
}
this.setVisible(true);
}

private void jbInit () throws Exception
{
this.setBounds(300,180,400,300);
getContentPane().setLayout(null);
jButton1.setBounds(new Rectangle(127, 120, 139, 36));
jButton1.setMnemonic('C');
jButton1.setText("点我(C)");
jButton1.addActionListener(new ActionListener()
{
public void actionPerformed (ActionEvent e)
{
jButton1_actionPerformed(e);
}
});
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.getContentPane().add(jButton1);
}

public void jButton1_actionPerformed (ActionEvent e)
{
this.setVisible(false);
JFrame jf1=new JFrame("子窗口");
jf1.setBounds(100,50,800,600);
jf1.setDefaultCloseOperation(jf1.EXIT_ON_CLOSE);
jf1.setVisible(true);
}
}

//窗体居中弹出类文件名：WindowsCenter.java类
package untitled1;

import java.awt.Toolkit;
import java.awt.Dimension;
import javax.swing.*;
//窗体居中类
public class WindowsCenter {
public WindowsCenter() {
}
public static void Center(JFrame frame){
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
Dimension frameSize = frame.getSize();
if (frameSize.height > screenSize.height) {
frameSize.height = screenSize.height;
}
if (frameSize.width > screenSize.width) {
frameSize.width = screenSize.width;
}
frame.setLocation((screenSize.width - frameSize.width) / 2,
(screenSize.height - frameSize.height) / 2);
frame.show();
}
}

//将这三个文件分别编译后执行

第二个文件名是Frame1.java，用命令javac Frame1.java可以编译，命令java Frame1.class可以执行