Bridge Pattern

Shape.java

public abstract class Shape {

	protected ColorAPI colorHandle;
	public Shape(ColorAPI colorHandle){
		this.colorHandle=colorHandle;
	}
	
	public abstract void draw();
}

ColorAPI.java

public interface ColorAPI {

	public void applyColor();
}

Square.java

public class Square extends Shape {

	private int x,y;
	
	public Square(int x, int y, ColorAPI colorHandler) {
		// TODO Auto-generated constructor stub
		super(colorHandler);
		this.x=x;
		this.y=y;
		
	}

	@Override
	public void draw() {
		// TODO Auto-generated method stub
		System.out.println("Drawing shape of square from co-ordinates x:" + this.x + ", y:"+this.y);
		this.colorHandle.applyColor();
	}

}

GreenColor.java

public class GreenColor implements ColorAPI {

	public GreenColor() {
		// TODO Auto-generated constructor stub
		super();
	}

	@Override
	public void applyColor() {
		// TODO Auto-generated method stub
		System.out.println("applying green color");
	}

}

RedColor.java

public class RedColor implements ColorAPI {

	public RedColor() {
		// TODO Auto-generated constructor stub
	}

	@Override
	public void applyColor() {
		// TODO Auto-generated method stub
		System.out.println("Applying red color");
	}

}

BridgePatternDemo.java

public class BridgePatternDemo {

	public BridgePatternDemo() {
		// TODO Auto-generated constructor stub
	}

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		//Draw the Red square
		ColorAPI colorHandleRed = new RedColor();
		Shape redSquare = new Square(10, 10, colorHandleRed);
		redSquare.draw();
		
		//Draw the Green Square
		ColorAPI colorHandleGreen = new GreenColor();
		Shape greenSquare = new Square(20, 20, colorHandleGreen);
		greenSquare.draw();
		
		
	}

}

Output