package ceshi;

public class CeShi {

public void mianJi(double a) {

System.out.println("圆的面积为：" + Math.PI * a*a);

}

public void mianJi(float a, float b) {

System.out.println("长方形的面积为：" + a * b);

}

public static void main(String[] args) {

// TODO Auto-generated method stub

CeShi cs=new CeShi();

cs.mianJi(4.5);

cs.mianJi(8,5);

}

}

​