数组使用（3种）

package array;

public class demo03 {
    public static void main(String[] args) {
        int[] array1={1,2,3,4,5};
        //JDK1.5,没有下标
        //for增强//1.for-each
        for (int i : array1) {
            System.out.println(i);
        }
        printarray(array1);
       int[] array2= reverse(array1);
       printarray(array2);
    }
    //打印数组元素//2.数组作为方法入参
    public static void printarray(int[] arrays){
        for (int i = 0; i < arrays.length; i++) {
            System.out.println(arrays[i]);
        }

    }
//反转数组元素//3.数组作为返回值
    public static int[] reverse(int[] arrays){
    int[] result = new int[arrays.length];
        for (int i = 0,j=result.length-1; i