//定义一个Circle类,包含一个double型的radius属性代表圆的半径,一个findArea()方法
//返回圆的面积
public class Circle {
double radius;//半径
//求圆的面积
public double findArea(){
return Math.PI*radius*radius;
}
}
public class PassObject {
public static void main(String[] args) {
PassObject test = new PassObject();
Circle c = new Circle();
test.printAreas(c,5);
System.out.println("now radius is:"+c.radius);
}
public void printAreas(Circle c,int time){
System.out.println("Radius\t\tArea");
for(int i=1;i<=time;i++){
c.radius=i;
System.out.println(c.radius+"\t\t"+c.findArea());
}
c.radius=time+1;
}
}