Documentation

The org.openpatch.scratch package contains classes that provide an API for creating Scratch-like projects in Java.

The documentation with many examples can be found at https://scratch4j.openpatch.org.

To create a scratch4j project, you will need to create a class that extends the Window class.

The Window class is the main class that represents the window of the project.

import org.openpatch.scratch.Window;
 
public class Game extends Window {
     public Game() {
         super(800, 600);
         this.setStage(new MyStage());
     }
}

The Stage class represents the stage of the project.

import org.openpatch.scratch.Stage;
 
class MyStage extends Stage {
     public MyStage() {
         this.add(new MySprite());
     }
}

The Sprite class represents a sprite in the project.

import org.openpatch.scratch.Sprite;
 
class MySprite extends Sprite {
     public MySprite() {
         this.setCostume("cat_sitting", "cat.png");
     }
 
     public void run() {
         this.ifOnEdgeBounce();
         this.move(10);
     }
}

This will create a window with a stage containing a sprite that moves 10 pixels every frame and bounces off the edges of the window.

Documentation

Classes