Set relative path for files to read with BufferedReader

Question

I have an app, that needs to read files line by line. I'm using the following code and it's ok.

public ArrayList <String[]> LoadServersFile(String filename){
BufferedReader br=null;
ArrayList <String> result = new ArrayList();
try {
    String sCurrentLine;
    InputStreamReader reader =  new InputStreamReader(this.getClass().getResourceAsStream("/"+filename));
    br = new BufferedReader(new FileReader(filename));

    while ((sCurrentLine = br.readLine()) != null) {
        result.add(sCurrentLine);
    }
    br.close();
} catch (FileNotFoundException ex) {
    Logger.getLogger(FilesIO.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
    Logger.getLogger(FilesIO.class.getName()).log(Level.SEVERE, null, ex);
}
return result;

}

But after compiling project and launching it, br.readLine() is always null. Setting "/file.txt" and putting this file to C:/ disk fixes the bug, but i need this file to be in folder with my .jar file

TheEwook · Accepted Answer · 2013-12-04T14:35:53.113

3

You can get your file using the getResourceAsStream method:

InputStreamReader reader =  new InputStreamReader(this.getClass().getResourceAsStream("/file.txt"));
BufferedReader br = new BufferedReader(reader);

edited Dec 04 '13 at 14:35

answered Dec 04 '13 at 14:25

TheEwook

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Shouldn't it be without the `/`? – Ben Dec 04 '13 at 14:27
1

@Ben No because we're are not using the classloader. http://stackoverflow.com/questions/6608795/what-is-the-difference-between-class-getresource-and-classloader-getresource – TheEwook Dec 04 '13 at 14:30
@TheEwook It throws me NullException when i'm trying to create reader. And change it to (reader) instead of (isReader) – crzbt Dec 04 '13 at 14:33
@crzbt My bad indeed ;) I modify my answer – TheEwook Dec 04 '13 at 14:35
@TheEwook but still it didn't work for me, throws `NullPointerException`. Updated my code.. – crzbt Dec 04 '13 at 14:40
1

@crzbt Can you try without the slash as Ben suggested? It works fine for me with the slash but a simple test does no harm ;) – TheEwook Dec 04 '13 at 14:42
@TheEwook Same result for both ways – crzbt Dec 04 '13 at 14:43

Set relative path for files to read with BufferedReader

1 Answers1