int line = 1;
		try
		{
			FileReader fr = new FileReader(getFileName()+".txt");
			BufferedReader br = new BufferedReader(fr);
			String a = br.readLine();
			String b = "";

			while(a != null)
			{
				StringTokenizer st = new StringTokenizer(a);
				while(st.hasMoreElements())
				{
					b = st.nextToken();
					if(bst.size() == 0)
						bst.insert(b, new WordNode(b, line));
					else if(bst.size() >= 1)
					{
						if(bst.find(b) == null)
							bst.insert(b, new WordNode(b, line));
						else
							bst.find(b).getValue().addLine(line);
					}
				}
				line++;
				a = br.readLine();
			}
		}
		catch(FileNotFoundException fnfe)
		{
			System.out.println("File not found!");
		}
		catch(IOException ioe)
		{
			System.out.println("Error!!");
		}
		return bst.size();