Circle2D.java

public class Circle2D implements Shape {
	int radius = 1;

	public Circle2D(int radius) {
		setRadius(radius);
	}

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

	public int getRadius() {
		return radius;
	}

	// Interface’deki iki method dolduruluyor.
	public double getArea() {
		return Math.PI * radius * radius;
	}

	public double getEnv() {
		return 2 * Math.PI * radius;
	}

	public static void main(String[] args) {
		Rect2D rect = new Rect2D(5, 10);
		System.out.println(rect.getArea());
		System.out.println(rect.getEnv());
		Circle2D circle = new Circle2D(5);
		System.out.println(circle.getArea());
		System.out.println(circle.getEnv());
	}

}