java 数组的翻转

import java.util.Arrays;

public class ArryFan2 {
    public static void main(String[] args) {
        int[] arr = {1,2,3,4,5};
        for (int left = 0,right = arr.length-1; left <right ; left++,right--) {
            int temp = arr[left];
            arr[left] = arr[right];
            arr[right] = temp;
        }
        System.out.println("数组为："+Arrays.toString(arr));
    }
}
import java.util.Arrays;

public class ArryFan {
    public static void main(String[] args) {
        int[] arr = {1,2,3,4,5};
        for (int i = 0; i < arr.length/2; i++) {
//            int tem = arr[i];
            arr[i] = arr[arr.length-i-1];
//            arr[arr.length-1-i] = tem;

        }
        System.out.println("换成后的数组"+ Arrays.toString(arr));
    }
}

两种写法