Package org.openpatch.scratch

package org.openpatch.scratch
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.