https://github.com/timothyjan/java-pong

Java Pong Game
https://github.com/timothyjan/java-pong

java jframe

Last synced: about 1 month ago
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Java Pong Game

• Host: GitHub
• URL: https://github.com/timothyjan/java-pong
• Owner: TimothyJan
• Created: 2023-01-19T09:14:41.000Z (almost 3 years ago)
• Default Branch: master
• Last Pushed: 2023-01-22T05:09:42.000Z (almost 3 years ago)
• Last Synced: 2025-03-26T04:30:13.025Z (8 months ago)
• Topics: java, jframe
• Language: Java
• Homepage:
• Size: 32.2 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# Java-Pong

Java Pong Game

Main Menu



Gameplay



1-Creating the Window



    
Create Window using JFrame methods in Window.java.

    
Create Constants.java to hold constant values.

    
Create thread to run window.



2-The Game Loop



    
In Window.java, we want to call update method every frame of our game and we want to pass in how long it took to do the last frame.

    
Create Time.java to call Java's system get nano time to get the best time measurement on the OS we are running on.

    
Added code to run and update methods to check the frames per second(fps).

    
Import Graphics2D to create Graphics g2 in Window method and update g2 in update method.



3-Handling User Input



    
Create new class KL to implement KeyListener. Create methods keyPressed, keyReleased and isKeyPressed.

    
Initialize new KL keyListener in Window class and use using this.addKeyListener(keyListener) in public Window.

    
Add keyListener to listen for KeyEvents in update method.



4-Drawing the Player



    
Create paddles and ball on the screen and will use this to detect collisions.

    
Create class Rect for paddle and ball.

    
Create new Constants for width/height/color for paddle/ball and padding.

    
Initialize playerOne, ai, and ball as new Rects in public Window. Draw them in update method.



5-Making the Player Controller



    
Implement the PlayerController to move the player and ai.

    
Create new class PlayerController.

    
Initialize PlayerController in Window.

    
For smoother gameplay:

        


            
Changed all int values to double values.

            
In update method, create an image dbImage for double buffer image. Then create a Graphics dbg for double buffer graphics.

            
We will draw everything to this dbg which will not be displayed to the user.

            
Then we're going to return this dbg to our draw method and draw the image to the screen. 

            
This way everything gets drawn incrementally on an off screen and then we swap buffers and show this buffer to the user.

        

    

    
Create new constants TOOLBAR_HEIGHT and INSETS_BOTTOM to prevent paddles going off screen. 

    
Create new constant PADDLE_SPEED for use in paddle movement.



6a - Moving the Ball



    
Create new class Ball to handle Ball movement and collisions.

    
In Window.java, initialize Ball ball and make sure it is updated in update method. Update and draw ball.



6-AI Controller



    
In PlayerController,create a constructor for the AI that doesn't use the keyListener.

    
Create new class AIController. AI paddle will respond based on the ball being below or above the AI paddle.

    
In Window, initialize a AIController for aiController. Update and draw ai.



7-Keeping Score



    
Create new class Text.java. 

    
Create new constants for x/y positions for scores and score font size.

    
In Window, create and initialize Text leftScoreText/rightScoreText.

    
In Ball, add Text leftScoreText/rightScoreText as arguments to Ball.

    
Create new constant for win score and add code to determine win condition after ball passes either paddle.



8-MainMenu



    
Create new class MainMenu. Create Texts for startGame, exitGame and pongTitle and draw them.

    
Create new class ML for Mouse Listener to listen for mouse hover/click on the texts. Create and initialize ML in MainMenu.

    
In update in MainMenu add code to change color when hovering over startGame and exitGame.

    
Update Main for GameWindow(1) or MainMenu(0) states. Create method changeState to change states. 

    
In MainMenu, update mouse hover with Main.changeState(1);. Add this.dispose(); to run method when game state is changed to close MainMenu window.

    
In Window, add this.dispose(); to run method when game state is changed to close gameWindow.

    
In Ball, change the game state to 2 when player/ai wins and kill all threads.