猜 Sting 单词中的符号 java

Question

得到一个像这样的字符串：

String str = "###############";

得到猜词，例如：

String guess = "Java"

用户必须猜出的单词：

User input:

Sava

戒指应该是：

String str = "#a#a###########";

所有正确的符号都放在它们的索引上

String 是不可变的 class.

我选择了Stringbuilder

 for (int i = 0; i < length ; i++) {
    if (rnd.charAt(i) == guess.charAt(i) && rnd.charAt(i) != '#'){
       sb.append(rnd.charAt(i));
        }
   }

 System.out.println(sb);

 sb.delete(0, sb.length());

Stringbuilder 添加右符号不是在位置 'i'，而是在最后一个索引上。

示例：

guess word: Java

user input Sala:

System.out.println(sb);

###############aa

我怎样才能达到需要的结果？我应该使用什么工具？

需要的结果：

Example:
guess word Java:

user input Sala:


System.out.println(sb);
#a#a###########

Answer 1

您可以按照以下方式进行：

public class Main {
    public static void main(String[] args) {
        String str = "#a#a###########";
        String guess = "Java";
        String input = "Sala";
        StringBuilder sb = new StringBuilder();
        int i;
        for (i = 0; i < str.length() && i < guess.length() && i < input.length(); i++) {
            // In case of a match, append the matched character
            if (guess.charAt(i) == input.charAt(i)) {
                sb.append(guess.charAt(i));
            } else {// Else append the placeholder symbol from `str`
                sb.append(str.charAt(i));
            }
        }

        // Append the remaining placeholder characters from `str`
        sb.append(str.substring(i));

        // Display
        System.out.println(sb);
    }
}

输出：

#a#a###########

Answer 2

像这样工作：

private static String word(){
    String guess = new Scanner(System.in).nextLine();
    return guess;
}

private static void guessWord(String[]arr) {
    int random = new Random().nextInt(arr.length);
    String rnd = arr[random];

    int length = 15;

    StringBuilder sb = new StringBuilder();
    String guess = "";

    int rndLength = length - rnd.length();
    int guessLength = length - guess.length();


    do {
        System.out.println("Enter a word: ");
        guess = word();

       if (sb.length() < length){
           for (int i = 0; i < length ; i++) {
               sb.append("#");
           }
       }

        for (int i = 0; i < length  && i < rnd.length() && i < guess.length();  i++) {
            if (rnd.charAt(i) == guess.charAt(i)){
                sb.setCharAt(i, rnd.charAt(i));
                sb.delete(length, sb.length());
            }
        }

        if (rnd.equals(guess)){
            System.out.println("Guess word: " + rnd);
            break;
        }else if (!rnd.equals(guess)) {
            System.out.println(sb);
        }
    }while (!rnd.equals(guess));
}

猜 Sting 单词中的符号 java

Guessing symbols in a Sting word java

java

string

stringbuilder