Java使用Random类生成随机数示例

import java.util.Random;class RandomDie{  private int sides;  private Random generator;  public RandomDie(int s)  {    sides = s;    generator = new Random( );  }  public int cast( )  {    return 1 + generator.nextInt(sides);  }}public class RandomDieSimulator{  public static void main(String[] args)  {    int Num;    RandomDie die = new RandomDie(6);    final int TRIES = 15;        for (int i = 1; i <= TRIES; i++)    {      Num = die.cast();      System.out.print(Num + " ");    }    System.out.println();  }}