1. If you haven’t completed Objects as Return Types, do so now.
2. Open ObjectAsReturnType.java and add the following method.

public static void moveRect(Rectangle box, int dx, int dy){
  box.x = box.x + dx;
  box.y = box.y + dy;
}

3. Add the following lines to the end of main.

moveRect(box,50,100);
System.out.println(box.toString());

4. Compile and run the program.

$ javac ObjectAsReturnType.java 
$ java ObjectAsReturnType
java.awt.Rectangle[x=0,y=0,width=100,height=200]
java.awt.Point[x=50,y=100]
java.awt.Rectangle[x=50,y=100,width=100,height=200]

The complete class should appear as follows.

import java.awt.Rectangle;
import java.awt.Point;
public class ObjectAsReturnType{
  public static void main(String[] args){
    Rectangle box = new Rectangle(0,0,100,200);
    Point myPoint = ObjectAsReturnType.findCenter(box);
    System.out.println(box.toString());
    System.out.println(myPoint.toString());
    moveRect(box,50,100);
    System.out.println(box.toString());
  }
  public static Point findCenter(Rectangle box){
    int x = box.x + box.width / 2;
    int y = box.y + box.height / 2;
    Point retPoint = new Point(x,y);
    return retPoint;
  }
  public static void moveRect(Rectangle box, int dx, int dy){
    box.x = box.x + dx;
    box.y = box.y = dy;
  }
}