java课后习题point类

完成教材P116 三 编程题 3 (设计Point类…)
题目描述：

Demo类用于测试，通过键盘输入两个点的坐标，求它们的距离

	import java.util.Scanner;

	public class Main {
   
    public static void main(String[] args){
   
        Scanner sc=new Scanner(System.in);
        Point p1=new Point();
        System.out.println("please input the first point's (x,y):");
        p1.setX(sc.nextDouble());
        p1.setY(sc.nextDouble());
        Point p2=new Point();
        System.out.println("please input the Second point's (x,y):");
        p2.setX