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import java.util.Random;/** * Created by zcchen on 2017/4/11 0011. */ //这里使用的距离和速度都是常量public class Speed {    public static void main(String[] args) {        //create a seeded random number generator        Random random = new Random(47);        int distance, rtime;        //choose value from 1 to 200        distance=random.nextInt(200)+1;        System.out.println("distance="+distance);        //choose value from 1 to 10        rtime = random.nextInt(10)+1;        System.out.println("rtime="+rtime);        int s = distance/rtime;        System.out.println("时速是："+s);    }}