I am creating a connect4 program that allows for two players to play. In my Jframe I have 3 buttons for the player types and one to exit the game but I am not sure how to open up another JFrame when a button is clicked to go from choosing player 1 to choosing player 2.. My current code is below please show me how this can be done in the simplest way! thank you.

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

public class Connect4GUI extends JFrame { JButton button1, button2, button3, button4; //private static final int BUTTON_LOCATION_X = 100; //private static final int BUTTON_LOCATION_Y = 300;

public Connect4GUI() { //JFrame properties this.setSize (400,400); this.setVisible(true); this.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE); this.setTitle ("Connect Four"); //create panel and welcome label JPanel panel = new JPanel(); JLabel label1 = new JLabel("Welcome to Connect Four! Choose player 1 below!"); panel.add (label1); this.add (panel); //create player type buttons for user to click button1 = new JButton("Human"); button2 = new JButton("Computer w/ random moves"); button3 = new JButton("Computer w/ look ahead moves"); button4 = new JButton("Exit game"); panel.add (button1); panel.add (button2); panel.add (button3); panel.add (button4); button1.setBounds(100, 50, 200, 30); button2.setBounds(100, 90, 200, 30); button3.setBounds(100, 130, 215, 30); button4.setBounds (100, 170, 100, 30); button1.addActionListener (new Action()); button2.addActionListener (new Action()); button3.addActionListener (new Action()); button4.addActionListener (new Action()); } private class Action implements ActionListener { public void actionPerformed(ActionEvent e) { if (e.getSource() == button1) { //choose human player JOptionPane.showMessageDialog (null," Player 1 is a human."); } if (e.getSource() == button2) { // choose comp w/ random moves JOptionPane.showMessageDialog (null, "Player 1 is a computer"); } //choose number of lookahead moves for comp if (e.getSource() == button3) { String compMoves = JOptionPane.showInputDialog (null, "Enter computer look ahead moves between 1 and 6."); //check for non integers and invalid integers try { int foo = Integer.parseInt (compMoves); if (foo < 1 || foo > 6) { JOptionPane.showMessageDialog(null, "Must be between 1 and 6!"); } } catch (NumberFormatException nfe) { JOptionPane.showMessageDialog(null, "Enter an integer!"); } } //exit game if (e.getSource() == button4) { System.exit (0); } } } public static void main (String [] args) { new Connect4GUI(); }

}