Java将单个字符从char数组转换为String数组

Question

我正在从文本文件中读取一个单词(程序)，我想将其存储到名为 word1 的二维数组中。为此，我读入文件并将其存储到占位符数组中。然后，我将此占位符数组转换为字符数组，以便将每个字母分开。我现在想要将此字符数组中的单个字母发送回我之前创建的字符串数组 (word1)。最终，我希望 word1 数组变成这样

String word1[][] = {
   {"p", "*"}, {"r", "*"}, {"o", "*"}, {"g", "*"}, {"r", "*"}, {"a", "*"}, {"m", "*"},
};

一切正常，直到最后一位我尝试将 char 数组中的各个字母转换回 word1 数组。

FileReader file = new FileReader("C:/Users/Mark/Desktop/Java/Workshop 2/hangman.txt");
BufferedReader reader = new BufferedReader(file);

String text = "";
String line = reader.readLine(); //Keeps reading line after line 
while (line != null){
  text += line;
  line = reader.readLine();
}

String word1[][] = {
  {"", "*"}, {"", "*"}, {"", "*"}, {"", "*"}, {"", "*"}, {"", "*"}, {"", "*"},
};

String placeholder[] = text.split("\\s+");   //Converts text into an array

String s = "";
   for (String n:placeholder){
    s+= n;
  }

char[] charArray = s.toCharArray();

   for (int i = 0; i < 6; i++){
     word1[i][0] = new String(charArray[i]); //This is where problem occurs
   }

Answer 1

String 中没有定义 String(char) 构造函数。所以你不能这样做:

String word1[][]  = ...;
word1[i][0] = new String(charArray[i]); //This is where problem occurs

您需要的是String.valueOf(char c):

word1[i][0] = String.valueOf(charArray[i]);