java-计算两点之间的距离

package com.qyx;import java.util.Arrays;class point {double x;double y;double z;point(double _x,double _y,double _z){x=_x;y=_y;z=_z;}void setX(double _x){x=_x;}void setY(double _y){y=_y;}void setZ(double _z){z=_z;}double getDistance(point P){return (x-P.x)*(x-P.x)+(y-P.y)*(y-P.y)+(z-P.z)*(z-P.z);}}public class pro2 {public static void main(String[] args){point p=new point(1.0, 2.0, 3.0);point p1=new point(0.0, 0.0, 0.0);System.out.println(p.getDistance(p1));p.setX(5.0);System.out.println(p.getDistance(new point(1.0,1.0,1.0)));}}