switch在java中的用法

package com.it.Test;

import java.util.Scanner;

public class Test1 {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        System.out.println("周几");
        int weak = sc.nextInt();  //读取键盘值

        switch (weak){

            case 1:
                System.out.println("跑步");
                break;
            case 2:
                System.out.println("游泳");
                break;
            case 3:
                System.out.println("慢走");
                break;
            case 4:
                System.out.println("动感单车");
                break;
            case 5:
                System.out.println("拳击");
                break;
            default:
                break;
        }

    }

}