class A{}
A中包含有：
JFrame frameA;
JButton btnA;
class B{}
B中包含有：
final JFrame frameB;
Static boolean wantToSave = true;
frameB.addWindowListener( new WindowAdapter()
{
pubilic void windowClosing(windowEvent we)
{JDialog dlg }
...........
}
);
问题描述：实现的功能是每点击一次btnA则弹出一个frameB(即一个class B的instance被new)。当要关闭frameB的时候dlg弹出提示我选择Yes/No/No to all，当选No to all的时候（此时将wantToSave设成false）class B的全部instance的frameB都能够关闭。
实现方法代码如下：
package com.mansuo.test;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
/**
* 多窗口关闭
* @author Administrator
*
*/
public class CloseAll extends Frame implements ActionListener {
public CloseAll() {
super( "title ");
setSize(300, 200);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent ew) {
System.exit(0);
}
});
JPanel p = new JPanel();
p.setLayout(new FlowLayout(FlowLayout.CENTER));
newButton = new JButton( "new ");
p.add(newButton);
newButton.addActionListener(this);
closeButton = new JButton( "close ");
p.add(closeButton);
add(p, BorderLayout.NORTH);
}
public void actionPerformed(ActionEvent e) {
NewFrame f = new NewFrame();
f.show();
closeButton.addActionListener(f);
}
public static void main(String args[]) {
CloseAll c = new CloseAll();
c.show();
}
private JButton closeButton;
private JButton newButton;
}
class NewFrame extends JFrame implements ActionListener {
static int counter=1;
public NewFrame() {
setTitle( "titile " + counter++);
setSize(300, 200);
setLocation(30 * counter, 30 * counter);
}
public void actionPerformed(ActionEvent e){
dispose();
}
}