package top.qaqaq.java.P284;

public class Circle {

	private double radius;

	public Circle() {
		super();
		radius = 1;
	}

	public double getRadius() {
		return radius;
	}

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

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

package top.qaqaq.java.P284;

public class Cylinder extends Circle {

	private double length;

	public Cylinder() {
		super();
		length = 1;
	}

	public double getLength() {
		return length;
	}

	public void setLength(double length) {
		this.length = length;
	}

	public double findVolume() {
		return super.findArea() * length;
	}
	
	public double findArea() {
		return 2 * Math.PI * getRadius() * getRadius() + 2 * Math.PI * getRadius() * length;
	}
}