数组反转两种方法[通俗易懂]

		//数组反转
		for(int i = 0;i < arr.length / 2;i++) { 
   
			String t = "";
			t = arr[i];
			arr[i] = arr[arr.length - 1 - i];//length - 1
			arr[arr.length] = t;
		}
		//方法二
		for(int i = 0,j = arr.length ;i < arr.length / 2;i++,j--) { 
   
			String t = arr[i];
			arr[i] = arr[j];
			arr[j] = t;
		}