最近写的代码

package chaper05;

import java.util.Scanner;

import static MyTools.MyArrayTools.change;


public class Test {
    public static void main(String[] args) {
        //判断奇偶数
        Scanner a=new Scanner(System.in);
        System.out.print("请输入一个整数以判断是奇数还是偶数:");
        int num = a.nextInt();
        if(num % 2 ==0){
            System.out.println(num+"是一个偶数");
        }else{
            System.out.println(num+"是一个奇数");
        }
        System.out.println("----------------------------------------------");
        //判断平年还是闰年
        Scanner in = new Scanner(System.in);
        System.out.print("请输入年份,例如2000：");
        int year = in.nextInt();
        if( (year%4==0 && year%100 !=0) || year%400==0 ) {
            System.out.println(year+"是闰年");
        }else {
            System.out.println(year+"不是闰年");
        }
        System.out.println("----------------------------------------------");
        int[] arr= {2,9,5,6,7,8,0,1,4,3};
        //冒泡排序(2,9,5,6,7,8,0,1,4,3)
        for(int i=arr.length-1;i>0;i--) {
            for(int j=0;j< i;j++) {
                if(arr[j]>arr[j+1]) {
                    
                    
                    //注意用这种方法下标j和j+1两个数所对应的值不能相等,会将它更改为0
                    change(arr,j,j+1);
                }
            }
        }

        for(int i=0;i