Java-马士兵设计模式学习笔记-观察者模式-AWT简单例子

工程师梦森技术 2022年11月21日

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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();
     }
 }