菜鸟问题!!请各位大虾帮忙!!关于package编译和运行的问题!!!
class Point
{
double x,y,z;
void init(double x,double y,double z)
{ this.x=x;
this.y=y;
this.z=z;
}
double distance(double x,double y,double z)
{
double result;
result=Math.sqrt((x-this.x)*(x-this.x)+(y-this.y)*(y-this.y)+(z-this.z)*(z-this.z));
return result;
}
double distance(Point p){
return distance(p.x,p.y,p.z);
}
}
class usePoint
{
public static void main(String args[])
{
Point p1=new Point();
Point p2=new Point();
p1.init(0,0,0);
p2.init(1,1,1);
double d1=p1.distance(10,20,30);
double d2=p2.distance(p1);
System.out.println("点(10,20,30)和(0,0,0,)的距离为:"+d1);
System.out.println("点(0,0,0)和(1,1,1,)的距离为:"+d2);
}
}
怎样编译和运行?