利用Calendar类测试电脑运行速度

import java.util.Calendar;

public class ArrayCopy {
    public static void main(String[] args) {
        test();
    }
   public static void test(){
       Calendar instance = Calendar.getInstance();
       long s1=System.currentTimeMillis();
       for (int i = 0; i < 99999; i++) {
           System.out.println(i);
       }
       long s2=System.currentTimeMillis();
       System.out.println(s2-s1+"毫秒");
   }
}