Java-马士兵设计模式学习笔记-观察者模式-AWT简单例子

1.AWT简单例子

TestFrame.java

import java.awt.Button;
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;

public class TestFrame extends Frame {
    
    public void launch(){
        Button b = new Button("按钮");
        b.addActionListener(new MyActionListener1());
        b.addActionListener(new MyActionListener2());
        this.add(b);
        this.pack();
        
        this.addWindowListener(new WindowListener() {
            
            @Override
            public void windowClosing(WindowEvent e) {
                System.out.println("windowClosing");
                System.exit(0);
            }
            
            @Override
            public void windowClosed(WindowEvent e) {
                System.out.println("windowClosed");
            }

            @Override
            public void windowOpened(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
                
            }
            
        });
        
        this.setVisible(true);
    }
     
    private class MyActionListener1 implements ActionListener {

        @Override
        public void actionPerformed(ActionEvent e) {
            System.out.println("MyActionListener1");            
        }
        
    }
    
    private class MyActionListener2 implements ActionListener {

        @Override
        public void actionPerformed(ActionEvent e) {
            System.out.println("MyActionListener2");            
        }
        
    }
    
    
    public static void main(String[] args) {
        new TestFrame().launch();
    }
}

2.运行结果