算法：数组的反转

package com.atguigu;

public class Fanzhuan {
    public static void main(String[] args) {
        //数组的反转
        //方法一
        String[] arr=new String[]{"JJ","DD","MM","BB","GG","AA"};
        for(int i=0;i<arr.length/2;i++){
            String temp=arr[i];
            arr[i]=arr[arr.length-i-1];
            arr[arr.length-i-1]=temp;
        }
        //方法二
        for(int i=0,j=arr.length-1;i<j;i++,j--){
            String temp=arr[i];
            arr[i]=arr[j];
            arr[j]=temp;
        }
        for(int i=0;i<arr.length;i++){
            System.out.print(arr[i]+'\t');
        }
        
    }
}