如何使按钮将您带到GUI Java中的另一个框架？

Question

I would like to go to another frame of Connect Four by clicking the "PLAY ME" button, but I am very confused on how to do so. Here, I have the code for the opening page of connect four and labels and buttons set up on the page. Here is my code:

import java.awt.*;
import javax.swing.event.*;
import java.awt.Color.*;
import javax.swing.*;
import java.util.*;

public class Game implements ActionListener{
   public Game(){
      JFrame frame = new JFrame();
      frame.setVisible(true);
      frame.setSize(new Dimension(1000,1000));
      frame.setTitle("Connect Four");
      frame.setLayout(new BorderLayout());

      JButton play = new JButton();
      play.setPreferredSize(new Dimension(75,150));
      play.setBackground(Color.RED);
      play.setFont(new Font("Arial", Font.PLAIN, 40));
      play.setForeground(Color.BLACK);
      play.setText("CLICK ME TO PLAY");
      frame.add(play, BorderLayout.SOUTH);


      JPanel north = new JPanel(new BorderLayout());
      JLabel title = new JLabel("Connect Four");
      north.setBackground(Color.WHITE);
      title.setFont(new Font("Arial", Font.PLAIN, 100));
      title.setForeground(Color.RED);
      title.setHorizontalAlignment(0);
      title.setVerticalAlignment(1);
      frame.add(north, BorderLayout.NORTH);
      north.add(title);

      JPanel intro = new JPanel(new GridLayout(10,1));
      intro.setBackground(Color.WHITE);
      JLabel instructions = new JLabel("Instructions");
      instructions.setFont(new Font("Ariel", Font.PLAIN, 70));
      JLabel instructionsPart1 = new JLabel("Both players will be assigned a color, either red or black.");
      JLabel instructionsPart2 = new JLabel("Players will take turns placing the colored discs on to the board.");
      JLabel instructionsPart3 = new JLabel("The OBJECTIVE is to get four of one colored discs in a row.");
      instructionsPart1.setFont(new Font("Ariel", Font.PLAIN, 35));
      instructionsPart2.setFont(new Font("Ariel", Font.PLAIN, 35));
      instructionsPart3.setFont(new Font("Ariel", Font.PLAIN, 35));
      intro.add(instructions);
      intro.add(new JLabel(""));
      intro.add(instructionsPart1);
      intro.add(new JLabel(""));
      intro.add(instructionsPart2);
      intro.add(new JLabel(""));
      intro.add(instructionsPart3);
      intro.add(new JLabel(""));
      frame.add(intro, BorderLayout.CENTER);
      frame.add(intro);
      }  
}

Answer 1

Hide Your First Frame And Set Visiblity of second frame to true

        btnplay.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent arg0) {
       second_add second = new second_add();   
       setVisible(false); // Hide current frame
       second.setVisible(true);
        }
    });

Answer 2

Rather than changing the frame, change the panel. Instead of using JFrame 's add() method, use setContentPane(Container container)

Instead of adding buttons and what not to the frame, create another wrapper panel and use the BorderLayout on that, and then add that panel to the frame:

Example:

JPanel wrapper = new JPanel(new BorderLayout());
wrapper.add(play, BorderLayout.SOUTH);
//etc.   
frame.setContentPane(wrapper);

Then, to handle the button click, implement the ActionListener interface. Don't do it with the main class - you'll need more than one. Use an anonymous inner class, or a lambda expression. Example:

play.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e) {
        frame.setContentPane(someOtherJPanel);
    }
});