class Rhombus extends Square {
	private static int numOfRhombuses = 0;
	private int serialNumber;
	private double firstDiagonal1, secondDiagonal1;

	public Rhombus() {
		super(false);
		firstDiagonal1 = 1.0;
		secondDiagonal1 = 1.0;
		numOfRhombuses++;
		serialNumber = numOfRhombuses;
	}

	public Rhombus(double firstDiagonal1, double secondDiagonal1) {
		this.firstDiagonal1 = firstDiagonal1;
		this.secondDiagonal1 = firstDiagonal1;
	}
	public Rhombus(boolean check) {
		super(false);
		if (check == true) {
			numOfRhombuses++;
			serialNumber = numOfRhombuses;
		}
	} //End of Rhombus method

	public double getFirstDiagonal1() {
		return firstDiagonal1;
	} //End of getFirstDiagonal1 method

	public double getSecondDiagonal1() {
		return secondDiagonal1;
	} //End of getSecondDiagonal1 method

	public void setFirstDiagonal1(double firstDiagonal1) {
		this.firstDiagonal1 = firstDiagonal1;
	} //End of setFirstDiagonal1 method

	public void setSecondDiagonal1(double secondDiagonal1) {
		this.secondDiagonal1 = secondDiagonal1;
	} //End of setSecondDiagonal1 method

	public double findPerimeter() {
		return 4*super.getSideLength();
	} //End of findPerimeter method

	public double findArea() {
		return (firstDiagonal1 * secondDiagonal1)/2;
	} //End of findArea method

	public static int getNumOfRhombuses() {
		return numOfRhombuses;
	} //End of getNumOfRhombuses method

	public int getSerialNumber() {
		return serialNumber;
	}

	public String toString() {
		return ("[Rhombus " + serialNumber + "]\nSide Length: " + super.getSideLength() + "\nFirst Diagonal: " + getFirstDiagonal1() + "\nSecond Diagonal: " + getSecondDiagonal1() + "\nThe area is " + findArea() + "\nThe perimeter is " + findPerimeter() + "\n");
	} //End of toString method

	public boolean equals(Object o) {
		if (o instanceof Rhombus) {
			Rhombus rh = (Rhombus)o;
			if (this.getSerialNumber() == rh.getSerialNumber())
				return true;
		}
		return false;
	} //End of equals method
} //End of class Rhombus