java学习之旅34--面向对象_07_构造方法

1. 构造方法
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   • Point.java

   • public class Point {private double x;private double y;private double z;public double getX() {return x;}public void setX(double x) {this.x = x;}public double getY() {return y;}public void setY(double y) {this.y = y;}public double getZ() {return z;}public void setZ(double z) {this.z = z;}public Point(double x, double y, double z) {super();this.x = x;this.y = y;this.z = z;}/** * 计算两个点的距离 * @param p * @return */public double distance(Point p){return Math.sqrt((x-p.x)*(x-p.x)+(y-p.y)*(y-p.y)+(z-p.z)*(z-p.z));}public static void main(String[] args) {Point p1 = new Point(1, 1, 1);Point p2 = new Point(2, 2, 2);System.out.println(p1.distance(p2));}}