2

我正在为我的作业编写一个刽子手程序,但遇到了一个小问题。在我的程序中,为了分隔单词,我使用 '|' 象征。例如,这是要猜测的词:

U N I T E D | S T A T E S | O F | A M E R I C A

我有一个显示编号的 StringBuffer 变量。破折号在这里,

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

我尝试使用以下代码插入分隔符“|”

if(guessword.indexOf('|') == -1)
    System.out.print(" ");
else
    guessit.setCharAt(guessword.indexOf('|'),'|');

我知道它错了,它只插入 1 个分隔符。你能帮我在正确的位置插入分隔符吗?您也可以尝试删除 System.out.print(" "); 因为它不必要地留下空间。我可以使用休息吗?相反,对于上面的例子,我得到的显示为

_ _ _ _ _ _ | _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

我其实想要

_ _ _ _ _ _ | _ _ _ _ _ _ | _ _ | _ _ _ _ _ _ _

我的主要方法如下

public static void main()throws IOException
{
    Hangman obj = new Hangman();
    InputStreamReader isr = new InputStreamReader(System.in);
    BufferedReader br = new BufferedReader(isr);
    PrintWriter p = new PrintWriter(System.out,true);

    p.println("Lets play HANGMAN");
    p.println();
    p.println("Enter your choice according to the following options.\n
               NOTE: Words are related to the topics given below.\n
               1. Sports\n2. Movies\n3. Computer\n4. Food\n5. Countries");
    p.println();
    int choice = Integer.parseInt(br.readLine());
    obj.clearScreen();
    String bothwordandclue[] = new String[2];

    if(choice == 1)
        bothwordandclue = obj.Sports();
    else if(choice == 2)
        bothwordandclue = obj.Movies();
    else if(choice == 3)
        bothwordandclue = obj.Computers();
    else if(choice == 4)
        bothwordandclue = obj.Food();
    else if(choice == 5)
        bothwordandclue = obj.Countries();
    else
        p.println("Wrong choice");

    int counter = 6;
    String guessword = bothwordandclue[0];
    String wordclue = bothwordandclue[1];

    int lengthofword = (int)(Math.round(((double)guessword.length()/2)));
    int checkguess = 0;
    String a;
    StringBuffer guessit = new StringBuffer();

    for (int i = 0;i < lengthofword; i++)
        guessit = guessit.append("_ ");

    guessit.delete((2 * lengthofword)-1,(2 * lengthofword));

    if(guessword.indexOf('|') == -1)
        System.out.print(" ");
    else
        guessit.setCharAt(guessword.indexOf('|'),'|');

    p.println(guessit);
    do
    {
        p.println();
        p.println("Enter your guess letter in capitals");
        String guessletter = br.readLine();
        obj.clearScreen();

        for(int i = 0;i<lengthofword;i++)
        {
            if(guessletter.charAt(0) == guessword.charAt(2*i))
            {
                guessit.setCharAt(2*i,guessletter.charAt(0));
                checkguess=1;
            }                
        }
        if(checkguess == 1)
        {
            p.println("Correct Guess");
            p.println(guessit);
        }
        else
        {
            counter--;
            p.println("Wrong guess. You have " + counter + 
                                    " incorrect guesses left");
            p.println(guessit);
        }
        checkguess = 0;
        a = guessit.toString();
        if(a.equals(guessword))
        {
            p.println("You guessed the word!!!!!");
            counter=0;
        }        
    }while(counter>0);
}
4

3 回答 3

1

你可以做到这一点indexOf。只是您需要使用该方法的另一个版本,它从开始搜索的位置获取位置。在这里看到String#indexOf(String str, int fromIndex)你需要。

int index = guessword.indexOf("|");
while(index >= 0) {
   guessIt.setCharAt(index, '|')

   // Start searching for next "|" after this index
   index = guessword.indexOf("|", index+1));  
}
于 2012-10-24T18:46:21.253 回答
1

问题是每个索引setCharAtindexOf适用于一个索引,这就是它只替换第一个 | 的原因。您将不得不guessword多次迭代。您可以使用 Java 的其他一些内置 String 函数或使用简单的 for 循环,即

for(int i = 0; i < guessword.length(); i++){
    if(guessword.charAt(i) == '|')
        guessit.setCharAt(i, '|');
}
于 2012-10-24T18:40:42.270 回答
0

请参见String.replaceAll

如果您不了解正则表达式:

维基百科上的正则表达式

正则表达式备忘单

于 2012-10-24T18:40:16.950 回答