5.14Java窗口的切换

package 上机;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
public class wind implements ActionListener {
        JFrame f,f1;
        JPanel p,p1;
        JButton b,b1;
    public wind() {
        f = new JFrame();
        f1 = new JFrame();
        p = new JPanel();
        p1 = new JPanel();
        b = new JButton("登录");      
        b.addActionListener(this);
        f.setSize(400,400);
        f.add(p);
        p.add(b);
        f.setVisible(true);    
    }
    public static void main(String[] args) {
        new wind();
        }
    
    @Override
    public void actionPerformed(ActionEvent e) {
        f.setVisible(false);
        b1 = new JButton("注册");
        f1.setSize(400,400);
        f1.add(p1);
        p1.add(b1);
        f1.setVisible(true); 
        // TODO Auto-generated method stub
        
    }
}