public void removeLineFromFile(String file, String lineToRemove) {

    try {

      File inFile = new File(file);
      
      if (!inFile.isFile()) {
        System.out.println("Parameter is not an existing file");
        return;
      }
       
      //Construct the new file that will later be renamed to the original filename. 
      File tempFile = new File(inFile.getAbsolutePath() + ".tmp");
      
      BufferedReader br = new BufferedReader(new FileReader(file));
      PrintWriter pw = new PrintWriter(new FileWriter(tempFile));
      
      String line = null;
      boolean alreadyFound = false;
      
      //Read from the original file and write to the new 
      //unless content matches data to be removed.
      while ((line = br.readLine()) != null) {
        
        if (!line.trim().equals(lineToRemove)) {

          pw.println(line);
          pw.flush();
        }
        else
        {
        	if (!alreadyFound)
        	{
        		alreadyFound = true;
        	}
        	else
        	{
        		pw.println(line);
        		pw.flush();
        	}
        }
      }
      pw.close();
      br.close();
      
      //Delete the original file
      if (!inFile.delete()) {
        System.out.println("Could not delete file");
        return;
      } 
      
      //Rename the new file to the filename the original file had.
      if (!tempFile.renameTo(inFile))
        System.out.println("Could not rename file");
      
    }
    catch (FileNotFoundException ex) {
      ex.printStackTrace();
    }
    catch (IOException ex) {
      ex.printStackTrace();
    }
  }