我正在編寫一個骰子游戲程序，它為用戶和計算機創(chuàng)建一個骰子，然后詢問用戶名、骰子的面數(shù)以及用戶想在計算機上玩多少次迭代。然后讓程序在每次擲骰后檢查哪個擲骰更高，并在迭代結(jié)束時寫回每個用戶和計算機的總獲勝次數(shù)以及獲勝者是誰。我遇到的問題是我需要創(chuàng)建一個roll()類來隨機化骰子并將其設(shè)置為用戶滾動和計算機滾動的值，我收到此錯誤...Exception in thread "main" java.lang.IllegalArgumentException: bound must be positiveat java.util.Random.nextInt(Random.java:388)at classwork6_3.Die.roll(Die.java:52)at classwork6_3.ClassWork6_3.main(ClassWork6_3.java:29)這是我的main()課...package classwork6_3;import java.util.*;public class ClassWork6_3 {public static void main(String[] args) {    Scanner s = new Scanner(System.in);    Random r = new Random();    System.out.print("Enter user's name: ");    String name = s.nextLine();    int value = 0;    int value2 = 0;    System.out.print("How many sides does the die have?: ");    int sides = s.nextInt();    s.nextLine();    System.out.print("How many times would you like to roll?: ");    int numRoll = s.nextInt();    int counter = 0;    int counter2 = 0;    Die user = new Die(name, sides, value);    Die comp = new Die(value);    for(int i = 1; i<= numRoll; i++){        value = r.nextInt(user.roll(sides)) + 1;        value2 = r.nextInt(comp.roll(sides)) + 1;        System.out.printf("%s rolled: %d\n", user.getOwner(), user.getValue());        System.out.print("Computer rolled: " + comp.getValue() + "\n\n");            if(value > value2){                counter++;            } else if(value2 > value){                counter2++;            }   }            System.out.printf("%s TOTAL WINS: %d\n", user.getOwner(), counter);            System.out.print("Computer TOTAL WINS: " + counter2 + "\n\n");                if(counter > counter2){                    System.out.printf("%s wins!!\n", user.getOwner());                }else if(counter2 > counter){                    System.out.print("Computer wins\n");                }else{                    System.out.print("It's a tie!\n");                }}}