数组使用

For-Each 循环

数组作方法入参

数组作返回值

package com.pln.array;
public class ArrayDemo03 {
    public static void main(String[] args) {
        int[] a = {1,2,3,4,5};
        int sum = 0;
        for (int i : a) {
            System.out.print(i+" ");
            //        计算所有和
            sum +=i;
        }
        System.out.println("sum="+sum);
//        返回一个新数组
        int[] arrays = servset(a);
//        打印数组
        for (int i = 0; i < arrays.length; i++) {
            System.out.print(arrays[i]+" ");
        }
    }
    //把数组倒叙
    public static int[] servset(int[] arrays){
        int[] resule = new int[arrays.length];
        for (int i = 0,j=resule.length-1; i < arrays.length; i++,j--) {
            resule[j] = arrays[i];
        }
        return resule;
    }
}