java多级模态窗口java多级模态窗口

package jsu; //案例： // MainUI是一个JFrame，点击JFrame中的按钮弹出模态的JDialog对象d1, //点击d1中的按钮弹出JDialog对象d2， import java.awt.FlowLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.*; //主窗口 class MainUI2 extends JFrame { private JButton jb;// 窗体按钮 public MainUI2() { jb = new JButton("弹出第1层JDialog对象d1"); this.setLayout(new FlowLayout()); this.setSize(300, 300); this.add(jb); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jb.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent arg0) { // TODO Auto-generated method stub new D2(MainUI2.this); } }); this.setVisible(true);// 显示窗体 } } // 第1层JDialog class D2 extends JDialog { // final JDialog dialog; private JTextField jt; JButton jb; JPanel jp; public D2(JFrame jf) { super(jf, "第1层Dialog"); jt = new JTextField("D1 对话框"); jb = new JButton("弹出2层JDialog"); JButton cancel = new JButton("取消"); this.setSize(200, 300); this.setLayout(new FlowLayout()); this.add(jt); this.add(jb); this.add(cancel); // this.setContentPane(jp); this.setModal(true);// 模态 jb.addActionListener(new MyAc()); cancel.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { D2.this.dispose(); } }); this.setVisible(true);// Dialog可见，是最后一条语句 } private class MyAc implements ActionListener { @Override public void actionPerformed(ActionEvent e) { jt.setText("第1层Dialog"); new D3(D2.this, "第2层JDialog"); } } } // 第2层JDialog class D3 extends JDialog { private JTextField jt; JButton jb; JPanel jp; public D3(JDialog dialog, String title) { super(dialog, title); // this.setTitle(""); jp = new JPanel();// 把面板放置在JDialog jt = new JTextField("第2层JDialog"); jb = new JButton("取消"); this.setSize(200, 300); jp.setLayout(new FlowLayout()); jp.add(jt); jp.add(jb); this.setContentPane(jp); this.setModal(true); jb.addActionListener(new MyAc()); this.setVisible(true);// 最后一条语句 } private class MyAc implements ActionListener { @Override public void actionPerformed(ActionEvent e) { D3.this.dispose(); } } } //测试类 public class DemoY { public static void main(String[] args) { new MainUI2(); } }