Java基础（10）----------反转数组reverse_java 数组 rever

1.for循环，倒序输出

package day01;
 
public class Rev {
    public static void main(String[] args) {
        int[]arr = {1,3,5,7,9};
        for (int i = arr.length-1; i >=0; i--) {
            System.out.print(arr[i]);
        }
    }
}

2. 将最后一个值赋给第一个值

package day01;
 
public class Rev {
    public static void main(String[] args) {
        int[] arr = {1,3,5,7,9};
        int[] newArr =new int[arr.length];
        for(int i = 0,j=arr.length-1;i<arr.length;i++,j--){
            newArr[i]= arr[j];
            System.out.print(newArr[i]);
        }
    }
}