See More

package jdk; /** * Created by jiangyunxiong on 2018/7/26. */ public class ForTest { public static void main(String[] args) { int[] array = new int[10000000]; Long time = System.currentTimeMillis(); for (int i:array) { int m = 1; } System.out.println(System.currentTimeMillis()); time = System.currentTimeMillis(); for (int i =0 ;i