达内(实现测试java运行时间代码)

package demo01;import java.util.Arrays;import java.util.Random;public class Demo01 {/** * @param args */public static void main(String[] args) {//int[] aryone = new int[]{1,2,3,4,5,6,7,8};//int[] arytwo = Arrays.copyOf(aryone,  aryone.length);////System.out.println(Arrays.toString(aryone));//System.out.println(Arrays.toString(arytwo));int[] aryone = new int[500000];Random random = new Random(5);//这里为了每次都一样的序列for(int i = 0; i < aryone.length; i++){aryone[i] = random.nextInt(10000);//int 范围}//int[] arytwo = Arrays.copyOf(aryone, aryone.length);long t1 = System.currentTimeMillis();Arrays.sort(aryone);long t2 = System.currentTimeMillis();System.out.println("系统自带优化的排序的用时:" + (t2-t1));}}