Squares and Rectangles in Java

gistfile1.java

public class Rectangle {
    private final int h;
    private final int w;

    public Rectangle(int height, int width) {
        h = height;
        w = width;
    }

    public int getH() {
        return h;
    }

    public int getW() {
        return w;
    }

    public Rectangle setH(int height) {
        return new Rectangle(height,w);
    }
    
    public Rectangle setW(int width) {
        return new Rectangle(h,width);
    }

    public int perimeter() {
        return 2 * (h + w);
    }

    public int area() {
        return h * w;
    }

}

public class Square extends Rectangle {
    public Square(int side) {
        super(side,side);
    }
}