数组的使用||反转操作，数组作为方法入参

for-each循环
数组作为方法入参数
数组作为返回值
public class ArrayDemon4 {
public static void main(String[] args) {
int i;
int j;
int[] arrays = {1, 2, 3, 4, 5};
int[] reverse = reverse(arrays);
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=result.length-1;i<arrays.length;i++,j--){
        result[j]=arrays[i];
    }
    return result;

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

}