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Initial Question:
A beginner in Java components seeks assistance in switching between MenuPanel and GamePanel within a JFrame. The current code only creates a blank JFrame upon calling gameOn(), rather than initiating the game. Suggestions are welcomed to resolve this issue, taking into account the presence of a mouse listener in MenuPanel.
Solution:
Instead of employing the approach of removing and adding components, it is advisable to utilize a CardLayout. This allows for the seamless transition between panels without the need for repeated addition and removal.
Code Implementation:
<code class="java">CardLayout cardLayout = new CardLayout(); JPanel mainPanel = new JPanel(cardLayout); MenuPanel menu = new MenuPanel(); GamePanel game = new GamePanel(); mainPanel.add(menu, "menu"); mainPanel.add(game, "game"); ... public void gameOn() { cardLayout.show(mainPanel, "game"); }</code>
Explanation:
Example:
For a practical demonstration, consider the following code:
<code class="java">import java.awt.BorderLayout; import java.awt.CardLayout; import java.awt.Color; import java.awt.Dimension; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.SwingUtilities; public class GameFrame extends JFrame implements ActionListener{ CardLayout cardLayout; JPanel mainPanel; MenuPanel menu; GamePanel game; public GameFrame() { cardLayout = new CardLayout(); mainPanel = new JPanel(cardLayout); menu = new MenuPanel(); game = new GamePanel(); mainPanel.add(menu, "menu"); mainPanel.add(game, "game"); JButton goGame = new JButton("Go TO Game"); goGame.addActionListener(this); add(mainPanel); add(goGame, BorderLayout.SOUTH); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); pack(); setLocationByPlatform(true); setVisible(true); } @Override public void actionPerformed(ActionEvent e) { gameOn(); } public void gameOn() { cardLayout.show(mainPanel, "game"); } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable(){ @Override public void run() { GameFrame gameFrame = new GameFrame(); } }); } } class MenuPanel extends JPanel { public MenuPanel() { setBackground(Color.GREEN); add(new JLabel("Menu")); } @Override public Dimension getPreferredSize() { return new Dimension(300, 300); } } class GamePanel extends JPanel { public GamePanel() { setBackground(Color.BLUE); add(new JLabel("Game")); } @Override public Dimension getPreferredSize() { return new Dimension(300, 300); } }</code>
This implementation showcases the use of CardLayout to smoothly transition between the MenuPanel and GamePanel within a JFrame.
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