// date:17.4.13

// author: linyang <942510346@qq.com>

package chap9;

import static java.lang.System.out;

public class Circle extends GeometricObject {

private double radius;

public Circle() {

}

public Circle(double radius) {

this.radius = radius;

}

public double getRadius() {

return radius;

}

public void setRadius(double radius) {

this.radius = radius;

}

public double getArea() {

return radius * radius * Math.PI;

}

public double getDiameter() {

return 2 * radius;

}

public double getPrimeter() {

return 2 * radius * Math.PI;

}

public void printCircle() {

out.println("the Circle is created " + getDateCreated() + " and the radius is " + radius);

}

}