无法取消引用int，请将int值从数组转换为字符串 [英] int cannot be dereferenced, convert an int value from an array to a string

问题描述

我正在编写一个程序来打印保龄球比赛的分数.分数以名为rolls的int数组提供:

I am writing a program to print out the scores of a bowling game. The scores are provided in an int array called rolls:

rolls = new int[] {1, 1, 2, 2, 3, 3, 4, 4, 5, 4, 6, 3, 2, 7, 1, 8, 0, 9, 0, 0}; 

我将分数值转换为字符串以便打印出来，因为某些值(例如代表罢工的10)需要以字符串形式打印出来，例如值"10"的"X".我是试图将int转换为字符串，并且不知道如何解决发生的错误，即无法取消引用int".我没有太多的编程经验，因此简单的答案现在对我最有帮助.

I am converting the score values to strings in order to print them out because some of the values, like 10 which represents a strike, need to be printed out as strings, like "X" for a value of 10. I am trying to convert the ints to strings and do not know how to fix the error thats occurring, "int cannot be dereferenced." I don't have a lot of experience programming so straightforward answers will be most helpful to me at this point.

public class Bowling {
    private int frames;
    private int[] rolls;
    int currentFrameCount=0;
    int currentFrame=1;
    int grantTotal=0;
    int ballCount=1;

public Bowling(int[] rolls, int frames)
{
   this.frames=frames;
   this.rolls=rolls;
}

public void play()
{
    String box1="";
    String box2="";
    String box3="";
    int totalScore = 0;
    for(int i=0; i < rolls.length; i += 2)
    {
        totalScore += rolls[i] + rolls[i+1];

        if(rolls.length % 2 == 0)
        {
            printNormalFrame(rolls[i].toString(), rolls[i+1].toString(), *totalScore.toString());***-->having the error here**
        }

        else
        {
            printBiggerFrame(rolls[i].toString(), rolls[i+1].toString(), totalScore.toString());
        }

    }
}

public void printNormalFrame(String box1, String box2, String totalScore)
{

   System.out.println("+---+---+");
   System.out.println("| " + box1 + " | " + box2 + " |");
   System.out.println("|---+---|");
   System.out.println("|       " + totalScore + " |"); //todo do the padding correctly using String.Format(...), 
   System.out.println("+---+---+");
}

public void printBiggerFrame(String box1, String box2, String box3, int totalScore)
{
    {
        System.out.println("+---+---+---+");
        System.out.println("| " + box1 + " | " + box2 + " | " + box3 + " |");
        System.out.println("|---+---+---|");
        System.out.println("|      "+totalScore+"|"); //todo the padding     correctly using String.Format(...)
        System.out.println("+---+---+---+");
    }

推荐答案

int 是原始类型，因此没有可使用的方法.试试

int is a primitive type, so it has no methods for working with. Try

1. String.valueOf(rolls[i])
2. Integer.toString(rolls[i])
3. rolls[i] + ""
4. new Integer(rolls[i]).toString()

代替

rolls[i].toString()

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