GameFrame.java - Window Setup

The GameFrame class extends JFrame to create the main game window with proper configuration for the Pong game.

Source Code

 1import java.awt.*;
 2import javax.swing.*;
 3
 4public class GameFrame extends JFrame{
 5
 6    GamePanel panel;
 7    
 8    GameFrame(){
 9        panel = new GamePanel();
10        this.add(panel);
11        this.setTitle("Pong Game");
12        this.setResizable(false);
13        this.setBackground(Color.black);
14        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
15        this.pack();
16        this.setVisible(true);
17        this.setLocationRelativeTo(null);
18    }
19}

Code Analysis

Inheritance Structure

1public class GameFrame extends JFrame

Extends JFrame: Inherits all the functionality of a standard Swing window, including:

• Window decorations (title bar, close button)
• Event handling capabilities
• Layout management
• Visibility control

Constructor Breakdown

The constructor sets up the entire game window in a specific sequence:

1panel = new GamePanel();
2this.add(panel);

1this.setTitle("Pong Game");
2this.setResizable(false);
3this.setBackground(Color.black);

1this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

1this.pack();
2this.setVisible(true);
3this.setLocationRelativeTo(null);

Key Design Decisions

Fixed Size Window:

• setResizable(false) ensures consistent game experience
• Prevents display issues with collision detection and rendering
• Game dimensions are fixed in GamePanel.GAME_WIDTH/HEIGHT

Automatic Sizing:

• pack() method sizes window based on GamePanel.SCREEN_SIZE
• No need to manually calculate window dimensions
• Automatically accounts for window decorations

Immediate Startup:

• Constructor handles complete setup
• Game starts automatically when GameFrame is created
• No additional method calls needed from main

Common JFrame Configuration Pattern

This class demonstrates a typical JFrame setup pattern:

1public class MyFrame extends JFrame {
2    public MyFrame() {
3        // 1. Add components
4        // 2. Set window properties  
5        // 3. Configure behavior
6        // 4. Size and show
7    }
8}

Window Management Best Practices

Component Integration: The frame serves as a container for the GamePanel, delegating all game-specific functionality to the appropriate class.

Next: Explore GamePanel.java to see where the real game magic happens!