数组的使用

For-Each循环

int[] arrays = {1,2,3,4,5};
//JDK1.5以上，没有下标
for (int i : arrays) {
    System.out.println(i);
}

数组作方法入参

 public static void main(String[] args) {
        int[] arrays = {1,2,3,4,5};
        printArray(arrays);
    }
    //打印数组元素
    public static  void printArray(int[] arrays){
        for (int i = 0; i < arrays.length; i++) {
            System.out.print(arrays[i]+" ");
        }
    }

数组作返回值

public static void main(String[] args) {
        int[] arrays = {1,2,3,4,5};
        int[] reverse = reverse(arrays);
        //调用打印数组方法
        printArray(reverse);

    }
    //反转数组
    public static int[] reverse(int[] arrays){
        int[] result = new int[arrays.length];
        //反转的操作
        for (int i = 0,j = arrays.length-1; i < arrays.length; i++,j--) {
            result[j] = arrays[i];
        }
        return result;
    }