定义一个类，用于描述坐标点。

import java.util.Scanner;
public class Coordinatefive {
    public double x;
    public double y;
    public Coordinatefive() {
    }

    public Coordinatefive(double x, double y) {
        this.x = x;
        this.y = y;
    }

    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 void show(){
        System.out.println("该点与x轴距离为"+Math.abs(y)+",与y轴距离为"+Math.abs(x)+".格式为("+x+","+y+")");
    }
    public void OriginDistance(){
         double distance=Math.sqrt(x*x+y*y);
        System.out.println("该点到原点的距离为："+distance);
    }
    Scanner sc=new Scanner(System.in);
    public void AnywhereDistance(){
        System.out.println("请输入任意一点横坐标和纵坐标");
        double m=sc.nextDouble();
        double n=sc.nextDouble();
        double M=m>=0?m:(-m);
        double N=n>=0?n:(-n);
        double X=x>=0?x:(-x);
        double Y=y>=0?y:(-y);
        double distance=Math.sqrt((M-X)*(M-X)+(N-Y)*(N-Y));
        System.out.println("任一点（"+m+","+n+")到点（"+x+","+y+")的距离为"+distance);
    }
}

public class Subject7five {
    public static void main(String[] args) {
        Coordinatefive P=new Coordinatefive(-2,4.5);
        P.show();
        P.OriginDistance();
        P.AnywhereDistance();
    }
}