java - 在Java中，我的数组似乎只存储我最后添加的值

Question

嗨，正如你所看到的，我对此相当陌生，但我正在尝试制作一个非常基本的绞刑吏游戏。如果用户猜测是正确的，我想制作一个到目前为止他猜对的字母的数组。但我得到的只是数组中保存的最后一个键盘输入。

这是代码。

do {
    System.out.println("Choose a letter: ");
    firstGuess = keyboard.next();
    String [] GuessedWordSoFar = new String[wordToGuess.length()];  
    char[] wordToGuessInCharArray = wordToGuess.toCharArray();  

    if((new String(wordToGuessInCharArray).contains(firstGuess))){
        int index = -1;
        char c = firstGuess.charAt(0);
        for(int z = 0; (z <wordToGuessInCharArray.length)&& 
           (index == -1); z++){ 

            if( wordToGuessInCharArray[z] == c) {
                index = z;
                System.out.println("Correct");
                GuessedWordSoFar[index] = firstGuess;
            }
        }
        System.out.println(Arrays.asList(GuessedWordSoFar));
    }

Answer 1

问题在于 GuessedWordSoFar 数组的初始化位于 do-while 循环内，因此每次循环执行时都会重置。尝试下面的代码，这应该可以修复您的错误。

String [] GuessedWordSoFar = new String[wordToGuess.length()];
do {
System.out.println("Choose a letter: ");
firstGuess = keyboard.next();

char[] wordToGuessInCharArray = wordToGuess.toCharArray();

if((new String(wordToGuessInCharArray).contains(firstGuess))){
    int index = -1;
    char c = firstGuess.charAt(0);
    for(int z = 0; (z <wordToGuessInCharArray.length)&& 
       (index == -1); z++){ 

        if( wordToGuessInCharArray[z] == c) {
            index = z;
            System.out.println("Correct");
            GuessedWordSoFar[index] = firstGuess;
        }
    }
    System.out.println(Arrays.asList(GuessedWordSoFar));
}