Question

java点某个按钮,可以切换到下一个界面 跪求大神

今晚就要交作业了！！！跪求大神帮帮忙！第一个界面：import java.awt.Color;import java.awt.Font;import java.awt.GridLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.management.openmbean.OpenDataException;import javax.swing.ImageIcon;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;public class First extends JFrame implements ActionListener{ JPanel firstpane,pp,p1,p2,p3,p4; JButton jb1,jb2; JLabel L2; Font fontjb =new Font("幼圆", Font.CENTER_BASELINE,20); public First(){ /***************中部面板***************/ pp=(JPanel) getContentPane(); pp.setBackground(Color.CYAN); pp.setLayout(new GridLayout(3,8)); jb1=new JButton("进入-汽车租赁系统"); jb2=new JButton("退出-汽车租赁系统"); jb1.setFont(fontjb); jb2.setFont(fontjb); jb1.setBackground(Color.yellow); jb2.setBackground(Color.yellow); jb1.setForeground(Color.blue); jb2.setForeground(Color.blue); jb1.addActionListener(null); pp.add(new JLabel(new ImageIcon("IMAGE\\car1.jpg"))); pp.add(jb1); pp.add(jb2); /**************************************/ } public static void main(String[] args) { First f=new First(); f.setTitle("汽车租赁系统"); f.setSize(500,500); f.setDefaultCloseOperation(EXIT_ON_CLOSE); f.setVisible(true); } public void actionPerformed(ActionEvent e){ this.dispose(); second s=new second(); s.setVisible(true); }}是这样的两个Java文件 怎么点第一个出现第二个呢
第二个界面：
public class second extends JFrame{

JPanel p;
JButton d,x,n,b,z;
public second(){
p=(JPanel) getContentPane();
p.setLayout(new BorderLayout(6,6));
d=new JButton("中");
x=new JButton("西");
n=new JButton("南");
b=new JButton("北");
z=new JButton("中");
p.add(d,BorderLayout.EAST);
p.add(x,BorderLayout.WEST);
p.add(n,BorderLayout.SOUTH);
p.add(b,BorderLayout.NORTH);
p.add(z,BorderLayout.CENTER);
}
public static void main(String[] args) {
second t=new second();
t.setVisible(true);
}
}

Answer 1

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.management.openmbean.OpenDataException;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class First extends JFrame implements ActionListener{
    JPanel firstpane,pp,p1,p2,p3,p4; 
    JButton jb1,jb2;
    JLabel L2; 
    Font fontjb =new Font("幼圆", Font.CENTER_BASELINE,20); 
    public First(){
    
        pp=(JPanel) getContentPane();
        pp.setBackground(Color.CYAN);
        pp.setLayout(new GridLayout(3,8)); 
        jb1=new JButton("进入-汽车租赁系统");
        jb2=new JButton("退出-汽车租赁系统"); 
        jb1.setFont(fontjb); 
        jb2.setFont(fontjb); 
        jb1.setBackground(Color.yellow); 
        jb2.setBackground(Color.yellow); 
        jb1.setForeground(Color.blue); 
        jb2.setForeground(Color.blue); 
        jb1.addActionListener(this); //************************************************
        jb2.addActionListener(this); //************************************************
        pp.add(new JLabel(new ImageIcon("IMAGE\\car1.jpg")));
        pp.add(jb1); pp.add(jb2); 
        
        } 
    public static void main(String[] args) {
        First f=new First(); 
        f.setTitle("汽车租赁系统"); 
        f.setSize(500,500);
        f.setDefaultCloseOperation(EXIT_ON_CLOSE);
        f.setVisible(true);
        } 
    public void actionPerformed(ActionEvent e){ //***********************************
        if(e.getSource()==jb1){
            this.dispose(); 
            new second(); 
        }
        if(e.getSource()==jb2){
            System.out.println("谢谢使用XX系统，再见！");
            System.exit(0);
        }
        
        
    }
}


class second extends JFrame{

    JPanel p;
    JButton d,x,n,b,z;
    public second(){
        p=new JPanel();
        p.setLayout(new BorderLayout(6,6));
        d=new JButton("中");
        x=new JButton("西");
        n=new JButton("南");
        b=new JButton("北");
        z=new JButton("中");
        p.add(d,BorderLayout.EAST);
        p.add(x,BorderLayout.WEST);
        p.add(n,BorderLayout.SOUTH);
        p.add(b,BorderLayout.NORTH);
        p.add(z,BorderLayout.CENTER);
        
        //***************** 去掉主方法，改为下面几名***********************
        setSize(300,300);
        setLocationRelativeTo(null);
        add(p);
        setVisible(true);
        
    }
    
}