Java学习笔记（一）

package com.qf.note;


public class note01 {
    static class Point{
        private int x;
        private int y;


        public Point(){}

        public Point(int x, int y) {
            this.x = x;
            this.y = y;
        }

        public int getX() {
            return x;
        }

        public void setX(int x) {
            this.x = x;
        }

        public int getY() {
            return y;
        }

        public void setY(int y) {
            this.y = y;
        }

        public static void main(String[] args) {
            //得到两个点
            Point p1 = new Point(1,1);
            Point p2 = new Point(2,2);
            double distance = p1.getDistance(p2);
            System.out.println(distance);

            //使用静态方法
            double distance1 = Point.getDistance(p1,p2);
            System.out.println(distance1);
        }

        //求两点之间的距离方法
        //静态方法
        private static double getDistance(Point p1, Point p2) {
            double temp = Math.pow(p1.getX() - p2.getX(),2) + Math.pow(p1.getY() - p2.getY(),2);
            return Math.sqrt(temp);
        }
        //非静态方法
        private double getDistance(Point p) {
            double temp = Math.pow(this.getX() - p.getX(),2) + Math.pow(this.getY() - p.getY(),2);
            return Math.sqrt(temp);
        }
    }
    class Per{
        Per baby;
    }
}