java - int 不能被取消引用，将 int 值从数组转换为字符串

Question

我正在编写一个程序来打印保龄球比赛的比分。分数在称为 rolls 的 int 数组中提供:

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

我正在将得分值转换为字符串以便将它们打印出来，因为一些值(例如代表罢工的 10)需要作为字符串打印出来，例如“X”代表值 10。我是试图将整数转换为字符串，但不知道如何修复发生的错误，“无法取消引用整数。”我没有太多编程经验，所以在这一点上直接的答案对我最有帮助。

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("+---+---+---+");
    }

Answer 1

int 是原始类型，因此它没有任何处理方法。尝试

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

代替

rolls[i].toString()