java Scanner.hasNext始終爲假

Question

在我的代碼方法scanner.hasNext（）總是給出錯誤的結果。調試代碼時我明白了它。有人知道什麼問題？我檢查了文件。文件從字符串開始。

public class TextFileImplementor { 
    public static void main (String [] args){ 
     System.out.println("Enter the name of file\n"); 
     Scanner scanner = new Scanner(System.in); 
     File file = new File(scanner.nextLine()); 
     try { 
      scanner = new Scanner(file); 
      StringBuilder stringBuilder = new StringBuilder(); 
      while (scanner.hasNext()){ 
       stringBuilder.append(scanner.nextLine()); 
      } 
      String [] strings = stringBuilder.toString().split("\\. "); 
      File newFile = new File("new_" + file.getName()); 
      FileWriter fileWriter = new FileWriter(newFile, true); 
      for (String string : 
        strings) { 
       if (string.length()<141){ 
        fileWriter.write(string + "\n"); 
       } 
      } 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 


    } 
} 

Answer 1

問題已解決！我在輸入文件的編碼方面遇到了問題。我必須添加

fileWriter.flush(); 
fileWriter.close();