多个窗口的切换--JavaGUI设计

功能：
主要实现的功能为实现多个界面的切换，并且一个window的打开和关闭可以影响其他window。

不足：
①可以多次多开同一个界面（可以加一个变量控制）
②没有实现一个的窗体关闭，它的子窗体也随即关闭的效果
效果图：

第一个界面（主界面）

package 多界面跳转;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;

class Frame1 extends JFrame implements WindowListener
{
	JButton b2 = new JButton("界面2");
	JButton b11 = new JButton("界面11");

	
	private class btListener implements ActionListener
	{
		public void actionPerformed(ActionEvent e) {
			if(e.getActionCommand().equals("界面2")) 
			{
				setVisible(false);
				new Frame2();
			}
			else if(e.getActionCommand().equals("界面11"))
			{
				new Frame11();
			}
		}
	}
	
	public Frame1()
	{
		this.setTitle("界面1");
		this.setSize(400, 300);
		this.setLayout(new FlowLayout());
		b11.addActionListener(new btListener());
		b2.addActionListener(new btListener());
		this.add(b11);
		this.add(b2);
		this.setDefaultCloseOperation(EXIT_ON_CLOSE);
		this.setLocationRelativeTo(null);
	}

	
	

	public void windowOpened(WindowEvent e) {
	}

	public void windowClosing(WindowEvent e) {
		setVisible(true);
	}
	public void windowClosed(WindowEvent e) {
	}
	public void windowIconified(WindowEvent e) {
	}
	public void windowDeiconified(WindowEvent e) {
	}
	public void windowActivated(WindowEvent e) {
	}
	public void windowDeactivated(WindowEvent e) {
	}


	public static void main(String[] args) {
		Frame1 f1 = new Frame1();
		f1.setVisible(true);
	}
}

第二个界面

package 多界面跳转;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

class Frame2 extends JFrame implements ActionListener
{
	JButton bt = new JButton("界面21");
	Frame2()
	{
		this.setSize(350, 300);
		this.setLocationRelativeTo(null);
		this.setLayout(new FlowLayout());
		this.setTitle("界面2");
		this.add(bt);
		bt.addActionListener(this);
		this.addWindowListener(new Frame1());
		this.addWindowListener(new Frame11());		
		this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
		this.setVisible(true);
	}
	@Override
	public void actionPerformed(ActionEvent e) {
		new Frame21();
	}
}

由第一个界面打开的界面

package 多界面跳转;
import javax.swing.*;
import java.awt.*;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
class Frame11 extends JFrame implements WindowListener
{
	Frame11()
	{
		this.setSize(300, 200);
		this.setLocationRelativeTo(null);
		this.setTitle("界面11");
		this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
		this.setVisible(true);
	}

	@Override
	public void windowOpened(WindowEvent e) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void windowClosing(WindowEvent e) {
		// TODO Auto-generated method stub
		if(this.isVisible()) {
//			setSize(800,600);
		}
	}
		

	@Override
	public void windowClosed(WindowEvent e) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void windowIconified(WindowEvent e) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void windowDeiconified(WindowEvent e) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void windowActivated(WindowEvent e) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void windowDeactivated(WindowEvent e) {
		// TODO Auto-generated method stub
		
	}
}

由第二个界面打开的界面

package 多界面跳转;
import javax.swing.*;
import java.awt.*;
class Frame21 extends JFrame
{
	Frame21()
	{
		this.setSize(150, 100);
		this.setLocationRelativeTo(null);
		this.setTitle("界面21");
		this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
		this.setVisible(true);
	}
}