untitled1.java~3~

来自「java的打字程序」· JAVA~3~ 代码 · 共 24 行

package chapter11;

import java.util.Random;

public class Untitled1
{
    public Untitled1()
    {
    }

    public static void main(String[] args)
    {
         Random random = new Random();//随机数
         long l1 = System.currentTimeMillis();
         for (int i = 0; i < 100; i++)
         {
             int k = (int) (Math.random() * 100);
             System.out.println("k:"+k);
         }
         long l2  = System.currentTimeMillis();
         System.out.println("time:"+(l2 - l1));
    }
}