Java:计算随机变量的输出？

Question

在这个程序中，在掷骰子“x”次(用户输入)后，我想计算每个数字出现的次数。

我尝试创建一个 else if ，这会为每个随机数出现添加 1，但它似乎只适用于最后一个随机数，也许是因为 if 不在 while 循环中？我不确定如何在 while 循环中添加 ifss 和 else ifs...也许我把这个过于复杂化了

        System.out.println("Enter the number of times a 6 sided die " +
            "should\nbe rolled");
    Random r = new Random();
    int numberOfRolls = userInput.nextInt();
    int randomRoll;
    int timesRolled = 0;

    if (numberOfRolls <= 0) {
        System.out.println("Nope, that's below zero");
        System.exit(0);
    }
    do {
        timesRolled++;
        randomRoll = r.nextInt(6) + 1;
        System.out.println(randomRoll + " was rolled");
    }
    while (numberOfRolls > timesRolled);

    int numberOne = 0;
    int numberTwo = 0;
    int numberThree = 0;
    int numberFour = 0;
    int numberFive = 0;
    int numberSix = 0;

    if (randomRoll == 1)
    {
       numberOne ++;
    }
    else if (randomRoll == 2)
    {
        numberTwo ++;
    }
    else if (randomRoll == 3)
    {
        numberThree ++;
    }
    else if (randomRoll == 4)
    {
        numberFour ++;
    }
    else if (randomRoll == 5)
    {
        numberFive ++;
    }
    else if (randomRoll == 6)
    {
        numberSix ++;
    }
    System.out.println(" One: " +numberOne+ "\n Two: " +numberTwo+ "\n Three: " +numberThree+
            "\n Four: " +numberFour+ "\n Five: " +numberFive+ "\n Six: " +numberSix);
}

输出为:

> Enter the number of times a 6 sided die should
be rolled
3
2 was rolled
5 was rolled
1 was rolled

 One: 1
 Two: 0    
 Three: 0
 Four: 0
 Five: 0
 Six: 0

Answer 1

你的代码应该是这样的:

    int randomRoll = 6;
    int  timesRolled = 0;

    int numberOfRolls = 8;

    int numberOne = 0;
    int numberTwo = 0;
    int numberThree = 0;
    int numberFour = 0;
    int numberFive = 0;
    int numberSix = 0;

    Random r = new Random();


    while (numberOfRolls > timesRolled ){
        timesRolled++;
        randomRoll = r.nextInt(6) + 1;
        System.out.println(randomRoll + " was rolled");
        if (randomRoll == 1)
        {
            numberOne ++;
        }
        else if (randomRoll == 2)
        {
            numberTwo ++;
        }
        else if (randomRoll == 3)
        {
            numberThree ++;
        }
        else if (randomRoll == 4)
        {
            numberFour ++;
        }
        else if (randomRoll == 5)
        {
            numberFive ++;
        }
        else if (randomRoll == 6)
        {
            numberSix ++;
        }
        System.out.println(" One: " +numberOne+ "\n Two: " +numberTwo+ "\n Three: " +numberThree+
                "\n Four: " +numberFour+ "\n Five: " +numberFive+ "\n Six: " +numberSix);
    }