package test;
public class Circle2 {
double radius;
static int number0 = 0;
Circle2(){
radius = 1.0;
number0++;
}
Circle2(double newRad){
radius = newRad;
number0++;
}
static int getN(){
return number0;
}
double getArea(){
return radius * radius * Math.PI;
}
}
该程序返回值是2 为什么不是返回的是getArea?