円の幅、周囲のクラスを求めます

class Circle
{
double r;//1.インスタンスメソッド
double Pi;
double area;
double radi;

public void initCircle(double r)//2.멤버 메소드
{
	this.r=r; //this-> 인스턴스 자기 자신값
	Pi=3.14;
}
public void areaOfCircle()//2.넓이를 구하는 메소드
{
	area= Pi*r*r;
}
public void radiOfCircle()//2.둘레를 구하는 메소드
{
	radi=Pi*2*r;
}
public void printCS() //2.밑높넓 출력메소드.
{
	System.out.println("반지름:"+r);
	System.out.println("둘레:"+radi);
	System.out.println("넓이:"+area);
}

}
class CircleMain
{
public static void main(String[] args)
{
Circle c1= new Circle();
c1.initCircle(5);
c1.areaOfCircle();
c1.radiOfCircle();
c1.printCS();

	Circle c2= new Circle();
	c2.initCircle(10);
	c2.areaOfCircle();
	c2.radiOfCircle();
	c2.printCS();

	Circle c3= new Circle();
	c3.initCircle(30);
	c3.areaOfCircle();
	c3.radiOfCircle();
	c3.printCS();
}

}