Question

我想得到一些我正在编写的程序的帮助。我想输出两个，两个面部频率加在一起。这是我写的当前代码。它现在非常基础，写得很差。我对Java编码很陌生，所以请给我任何有助于我的提示和技巧:)。

import java.util.Random;

public class DiceRolling {

    public final static Random randomNumbers = new Random();

    public static void main(String[] args) {

        int[] dice1 = new int[7];
        int[] dice2 = new int[7];

        // prints out the headings

        for (int headOne = 1; headOne <= 6; headOne++)
            System.out.print(" " + headOne);

        System.out.println();

        for (int headTwo = 1; headTwo <= 6; headTwo++)
            System.out.println(headTwo);

        // The rolls of the two dices begins here

        for (int frequencyOne = 0; frequencyOne < 36000000; frequencyOne++) {
            ++dice1[1 + randomNumbers.nextInt(6)];
        }

        // output faces of die
        for (int faceOne = 1; faceOne < dice1.length; faceOne++) {
            System.out.print(" " + dice1[faceOne]);
        }
    }

}

Answer 1

以下代码将打印出每张脸的滚动次数。您会注意到，由于随机java库使用的随机数算法，所有面都滚动的次数几乎相同。如果您有任何疑问，请致电！

import java.util.HashMap;
import java.util.Map.Entry;
import java.util.Random;

public class DiceRolling {

    public final static Random randomNumbers = new Random();

    public static void main(String[] args) {
        // create a hashmap to hold the amount of times each number was rolled
        HashMap<Integer, Integer> frequencies = new HashMap<Integer, Integer>();

        // roll the dice 360000 times
        for (int rolls = 0; rolls < 360000; rolls++) {
            // roll dice
            int result = (randomNumbers.nextInt(6) + 1);

            // if the result has already happened add it
            if (frequencies.containsKey(result)) {
                frequencies.put(result, (frequencies.get(result) + 1));
                continue;
            }
            // else add it and set its frequency to 1
            frequencies.put(result, 1);
        }

        // print results
        for (Entry<Integer, Integer> entry : frequencies.entrySet()) {
            System.out.println("Face: " + entry.getKey() + ", Times rolled: " + entry.getValue());
        }
    }
}

如何输出两个骰子并将它们加在一起

1 个答案: