Java說一個非空文件是空的？

我有一個particular file是Java的說是空的...Java說一個非空文件是空的？

源代碼

import java.io.File; 
import java.io.FileNotFoundException; 
import java.util.Scanner; 

public class MinimumWorkingExample 
{ 
    public static void main(String[] args) throws FileNotFoundException 
    { 
     String filename = "/home/tyson/Data/English-French_test/test/test.f"; 
     Scanner fileIn = new Scanner(new File(filename)); 
     System.out.println("***START***"); 
     while(fileIn.hasNextLine()) 
     { 
      System.out.println(fileIn.nextLine()); 
     } 
     System.out.println("***FINISH***"); 
    } 
}

輸出

***START*** 
***FINISH***

...但該文件不爲空：

控制檯

[email protected]:~$ head /home/tyson/Data/English-French_test/test/test.f 
<s snum=0001> 2 . </s> 
<s snum=0002> 2 . </s> 
<s snum=0003> oh , oh ! </s> 
<s snum=0004> oh , oh ! </s> 
<s snum=0005> oh , oh ! </s> 
<s snum=0006> souvenons - nous , monsieur le Orateur , que ce sont ces secteurs de notre soci�t� qui servent de �pine dorsale � notre �conomie . </s> 
<s snum=0007> bravo ! </s> 
<s snum=0008> bravo ! </s> 
<s snum=0009> monsieur le Orateur , ma question se adresse � le ministre charg� de les transports . </s> 
<s snum=0010> tous deux poss�dent de nombreuses ann�es de exp�rience dans la fabrication et la distribution de les produits forestiers . </s> 
[email protected]:~$

問題

這究竟是爲什麼???

來源

2011-12-22 Tyson Williams

我試着用附加文件的程序，我能夠正確讀取文件的內容。 – 2011-12-22 02:25:06

@Jugal Joop建議，由於文件是法文的，我應該使用'Scanner fileIn = new Scanner（新文件（文件名），「Cp1252」）;'正確讀取文件。此修補程序適用於我。出於好奇，知道爲什麼你的系統默認可以正確閱讀法文（但我的不能）？ – 2011-12-22 02:33:11

另外做掃描儀fileIn =新掃描儀（新文件（文件名），「Cp1252」）;因爲這是法語的編碼，並且您的系統似乎是UTF-8。如果掃描儀認爲要讀取UTF-8多字節，可能會遇到編碼問題。

來源

2011-12-22 02:57:10

您可能缺少掃描儀的默認分隔符，因此它將整個文件看作一行而沒有結束，因此hasNextLine（）爲false。確保您獲得的字符爲

Scanner.delimiter()

存在於您的文件中。如果它們不匹配，則可以使用

Scanner.useDelimiter("\\s or your regex/string here")

將其設置爲正確的一個。

來源

2011-12-22 02:15:28 Thomas

也做掃描儀fileIn =新掃描儀（新文件（文件名），「Cp1252」）;因爲這是法語的編碼，並且您的系統似乎是UTF-8 – 2011-12-22 02:17:39

即使整個文件只有一行，「hasNextLine（）」應該爲該第一行返回「true」，對不對？那麼，當然，它會隨後返回「false」。 – 2011-12-22 02:18:32

@Joop你建議使用'掃描儀fileIn =新掃描儀（新文件（文件名），「Cp1252」）;'工作！做一個正式的回答說，我會接受它:) – 2011-12-22 02:25:55

根據Java文檔，行分隔符是以下任何一個。你的文件是否包含任何？

private static final String LINE_SEPARATOR_PATTERN = "\r\n|[\n\r\u2028\u2029\u0085]"

來源

2011-12-22 02:18:00 Akhil

Java說一個非空文件是空的？

回答

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