循环,打印函数，反转函数

public class HelloWorld {
    public static void main(String[] args) {
        int[] arrays = {1, 2, 3, 4, 5};
        printArray(arrays);
        int[] array = reverse(arrays);
        printArray(array);
        }




    public static void printArray(int[] arrays) {
        for (int i = 0; i < arrays.length; i++) {
            System.out.print(arrays[i] + " ");
        }
    }

    public static int[] reverse(int[] arrays) {
        int[] new_arrays = new int[arrays.length];
        for (int i = 0, j = arrays.length - 1; i < arrays.length; i++, j--) {
            new_arrays[j] = arrays[i];
        }
        return new_arrays;
    }
}

直接打印列表也可以用System.out.println(Arrays.toString(a));
数组填充方法fill
Arrays.fill(a,2,4,0);
数组排序方法Arrays.sort(a)