数组的使用

普通For循环

For-Each循环

数组做方法入参

数组做返回值

package com.kuang.array;
 ​
 //for-each循环
 public class ArrayDemo04 {
     public static void main(String[] args) {
         int[] arrays = {1, 2, 3, 4, 5};
 ​
         for (int array : arrays) {
             System.out.println(array);
         }
         System.out.println("========");
         printArray(arrays);
         System.out.println("========");
         for (int array : reverse(arrays)) {
             System.out.println(array);
         }
         System.out.println("========");
         printArray(reverse(arrays));
     }
 ​
 ​
     //打印数组元素
     //数组作为参数
     public static void printArray(int[] arrays) {
         for (int i = 0; i < arrays.length; i++) {
             System.out.println(arrays[i]);
         }
     }
 ​
     //反转数组
     //数组作为返回值
     public static int[] reverse(int[] arrays) {
         int[] result = new int[arrays.length];//定义一个返回数组，数组长度等于参数数组长度
         //反转的操作
         for (int i = 0, j = arrays.length - 1; i < arrays.length; i++, j--) {
             result[j] = arrays[i];
         }
 ​
         return result;
 ​
     }
 }

 ​