package cn.zytao.taosir.random;

import java.util.Random;

public class RandomDemo {

    private static Integer byNewRandom() {

        Random r=new Random();

        return r.nextInt(100);

    }

    private static Integer byMathRandom() {

        int max=100,min=1;

        return (int)(Math.random()*(max-min)+min);

    }

    private static Integer byCurrentTimeMillis() {

        int max=100,min=1;

        long randomNum=System.currentTimeMillis();

        return (int)(randomNum%(max-min)+min);

    }

    public static void main(String[] args) {

        for (int i = 0; i < 10; i++) {

            try {

                Thread.sleep(500);

            } catch (InterruptedException e) {

                e.printStackTrace();

            }

            //System.out.println(byNewRandom());

            //System.out.println(byMathRandom());

            System.out.println(byCurrentTimeMillis());

        }

    }

}