package Train.Method.TeachDemo.Thread.Fuction;

/**

 * 求n的阶乘算法

 * @author 喵

 * @date 2019年9月18日下午1:19:34

 */

public class Computer {

    public int num;

    public Computer() {

    }

    public Computer(int num) {

        this.num = num;

    }

    public long counter() {

        long sum = 1;

        for (int i = 1; i <= num; i++) {

            sum = sum * i;

        }

        return sum;

    }

}

package Train.Method.TeachDemo.Thread.FuctionTest;

import Train.Method.TeachDemo.Thread.Fuction.Computer;

import java.util.Scanner;

import Train.Method.TeachDemo.Thread.Fuction.Computer;

/**

 * Test

 * @author 喵

 * @date 2019年9月18日下午8:08:53

 */

public class ComputerTest {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);

        System.out.println("请输入一个整数：");

        int num = input.nextInt();

        Computer t = new Computer(num);

        System.out.println(t.counter());

    }

} 

/**

 * 坐标类

 *

 * @author 喵

 * @date 2019年9月18日下午8:12:32

 */

public class MyPoint {

    private int x;

    private int y;

    public MyPoint() {

    }

    public MyPoint(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 double distance(MyPoint p1, MyPoint p2) {

        int xside = Math.abs(p1.x - p2.x);

        int yside = Math.abs(p1.y - p2.y);

        double temp = Math.pow(xside, 2) + Math.pow(yside, 2);

        return (Math.sqrt(temp));

    }

}

import java.util.Scanner;

/**

 * 测试点距离类

 * @author 喵

 * @date 2019年9月18日下午3:53:51

 */

public class Test {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);

        System.out.println("请输入p1点的坐标");

        int x1 = input.nextInt();

        int y1 = input.nextInt();

        System.out.println("请输入p2点的坐标");

        int x2 = input.nextInt();

        int y2 = input.nextInt();

        MyPoint p1 = new MyPoint(x1, y1);

        MyPoint p2 = new MyPoint(x2, y2);

        System.out.println("两点之间的距离为；" + MyPoint.distance(p1, p2));

    }

}