Rectangle.java

public class Rectangle {
 private int sideA;
 private int sideB;
 private Point topleft;

 public Rectangle(int sideA, int sideB, Point topleft) {
 this.sideA = sideA; //width
 this.sideB = sideB; //height
 this.topleft = topleft;
 }

 public int getSideA() {
 return sideA;
 }

 public void setSideA(int sideA) {
 this.sideA = sideA;
 }

 public int getSideB() {
 return sideB;
 }

 public void setSideB(int sideB) {
 this.sideB = sideB;
 }

 public Point getTopleft() {
 return topleft;
 }

 public void setTopleft(Point topleft) {
 this.topleft = topleft;
 }
 public int area() {
 return sideA * sideB;
 }

 public int perimeter() {
 return 2 * (sideA + sideB);
 }

 public Point[] corners() {
 Point[] corners = new Point[4];
 corners[0] = topleft;
 corners[1] = new Point(topleft.getxCoord() + sideA, topleft.getyCoord());
 corners[2] = new Point(topleft.getxCoord() + sideA, topleft.getyCoord() - sideB);
 corners[3] = new Point(topleft.getxCoord(), topleft.getyCoord() - sideB);

 return corners;
 }
}