class Circle {
	private double radius = 0.0;

	public Circle(double r) {
		this.radius = r;
	}

	public void setRadius(double r) {
		this.radius = r;
	}

	public double getRadius() {
		return this.radius;
	}

	public String toString() {
		return "(" + radius + ")";
	}

	public boolean equals(Object obj) {

		if (!(obj instanceof Circle)) {
			return false;
		}

		Circle temp = (Circle) obj;

		return this.radius == temp.radius;
	}
}