关于JAVA的事件处理

Question

你在 then 後面new xxx() 就可以 xxx類是你定義的窗口類 然後在setSize(), setVisible ()；

Answer 1

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;public class testEvent extends JFrame
                       implements ActionListener{
    private JButton b1,b2;
    
    public testEvent(){
        Container ctp=getContentPane();
        
        b1=new JButton("b1");
        b2=new JButton("b2");
        ctp.setLayout(new FlowLayout());
        ctp.add(b1);
        ctp.add(b2);
        
        b1.addActionListener(this);
        b2.addActionListener(this);
        
        addWindowListener(new WindowAdapter(){
            public void windowClosing(WindowEvent e){
                System.exit(0);   
            }
        });
        
        setSize(300,300);
        setVisible(true);
    }
    public void actionPerformed(ActionEvent e){
        Object button=e.getSource();
        if (button==b1){
            //show frame1
            JFrame j1=new JFrame("frame1");   
            j1.setSize(300,300);
            j1.setVisible(true);
        }else{
              if (button==b2){
                //show frame2
                JFrame j2=new JFrame("frame2"); 
                j2.setSize(300,300);
                j2.setVisible(true);
              }
        }    
    }
    public static void main(String args[]){
        new testEvent();   
    }
}