缓冲的读者变更 [英] Buffered Reader Change

问题描述

我想用扫描器替换这段代码中的BufferedReader？我写了这段代码，但后来意识到我们不允许使用bufferedreader。但是Havent一个线索，甚至可以解决该问题。

Hi I want to replace the BufferedReader in the piece of code with scanner?? I wrote this code but then realized that we're not allowed use bufferedreader. But Havent a clue how to even go about,

 public static void Option1Method() throws IOException 
{
 FileWriter aFileWriter = new FileWriter("wordlist.txt", true);
 PrintWriter out = new PrintWriter(aFileWriter);
 String word = JOptionPane.showInputDialog(null, "Enter a word");

 out.println(word);
 out.close();

 aFileWriter.close();

 String inputFile = "wordlist.txt";
 String outputFile = "wordlist.txt";
 FileReader fileReader = new FileReader(inputFile);
 BufferedReader bufferedReader = new BufferedReader(fileReader);
 String inputLine;
 List<String> lineList = new ArrayList<String>();
 while ((inputLine = bufferedReader.readLine()) != null) {
    lineList.add(inputLine);
  }
 fileReader.close();

 Collections.sort(lineList);

 FileWriter fileWriter = new FileWriter(outputFile);
 PrintWriter out1 = new PrintWriter(fileWriter);
 for (String outputLine : lineList) {
     out1.println(outputLine);
 }
 out1.flush();
 out1.close();
 fileWriter.close();
}

推荐答案

看看定义为 hasNextLine 和 Scanner 类中的 nextLine 。

Take a look at the definitions for hasNextLine and nextLine in the Scanner class.

虽然 new Scanner（fileReader）可以工作，但您宁愿将文件名直接传递到 Scanner 的构造函数。

Although new Scanner(fileReader) works, you could rather pass the file name directly into the Scanner's constructor.

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