实现窗口切换

package bbb;

import java.awt.Color;

import java.awt.Font;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.*;

public class myframe implements ActionListener {

   JFrame f1,f2;

   JPanel p1,p2;

   JButton b1,b2;

   JLabel l1,l2,l3;

   JTextField t1,t2;//文本框

   public myframe() {

       f1=new JFrame("LYX");

       f2=new JFrame("LYX");

       p1=new JPanel();

       p2=new JPanel();

       p1.setLayout(null);//流布局

       p2.setLayout(null);

       b1=new JButton("注册");

       b2=new JButton("登录");

       l1=new JLabel("账户");

       l1.setFont(new Font("楷体",Font.BOLD,18));//自定义标签字体

       l2=new JLabel("密码");

       l2.setFont(new Font("楷体",Font.BOLD,18));

       l3=new JLabel("登录成功!");

       l3.setForeground(Color.red);

       t1=new JTextField();

       t2=new JTextField();

       b1.addActionListener(this);

       b2.addActionListener(this);

       f1.add(p1);

       p1.add(b1);

       p1.add(b2);

       p1.add(l1);

       p1.add(l2);

       p1.add(t1);

       p1.add(t2);

       b1.setBounds(150,150,60,40);

       b2.setBounds(270,150,60,40);

       l1.setBounds(80,50,40,30);

       l2.setBounds(80,100,40,30);

       t1.setBounds(120,50,300,30);

       t2.setBounds(120,100,300,30);

       f1.setVisible(true);

       f1.setSize(500,300);

   }

    public static void main(String[] args) {

         new myframe();

}

    public void actionPerformed(ActionEvent e) {

        f1.setVisible(false);

        p2.setBackground(new Color(211,252,4));//自定义面板颜色

        f2.setVisible(true);

        f2.add(p2);

        p2.add(l3);

        l3.setBounds(225,75,150,60);

        f2.setLocation(600,0);

        f2.setSize(500,300);

    }

}