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Thread: JFileChooser provides null string

  1. #1
    Junior Member
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    Default JFileChooser provides null string

    I'm getting a NullPointerException in my code. I've use the debugger and traced it to the chooser.getName() line. This is returning a null value to me.

    Does anyone have an idea where I went wrong? If it makes a difference, I'm using Linux Mint and the file selected is on a cifs network folder. Perhaps Java is having some problems working with my OS? I can browse the folders fine.

    Note, I have not initialized currentFile before this point. Not sure if that would make a difference.

    private String currentFile;
    private boolean setFile() // returns true if there is an error
      JFileChooser chooser = new JFileChooser();
      chooser.setFileFilter( new FileNameExtensionFilter(
        "XML files", "xml"));
      if (chooser.showOpenDialog(this) != JFileChooser.APPROVE_OPTION)
        return true;
      currentFile = chooser.getName();
      return false;

  2. #2
    Administrator copeg's Avatar
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    Default Re: JFileChooser provides null string

    See the API for JFileChooser - getName is a method for Component, which must be set with setName. I presume you want the file name, or absolute path, in which case you should be calling getSelectedFile

  3. The Following User Says Thank You to copeg For This Useful Post:

    stewbond (November 1st, 2013)

  4. #3
    Junior Member
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    Default Re: JFileChooser provides null string

    Whoops! Thanks for the easy fix.

    I was reading about this class here:
    JFileChooser (Java Platform SE 7 )
    I guess I skipped over the getSelectedFile() part of it.

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