java swing打开子窗口后主窗口还用

 

package com.ui;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JDialog;import javax.swing.JFrame;public class TestMode extends JFrame implements ActionListener{JDialog dialog;public TestMode(){setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);JButton b = new JButton();b.addActionListener(this);getContentPane().add(b);setSize(100,100);}public static void main(String[] args){TestMode frame = new TestMode();frame.setVisible(true);}public void actionPerformed(ActionEvent e) {if(dialog == null){dialog = new JDialog(this, true);JButton b = new JButton();b.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {//需要隐藏再显示，以便释放锁dialog.setVisible(false);dialog.setModal(false);dialog.setAlwaysOnTop(true);dialog.setVisible(true);}});dialog.add(b);dialog.setSize(100,100);}dialog.setVisible(true);}}