public int getCountContainKeyOfClassification(String classification,String key) 
	{
		int ret = 0;
		try 
		{
			String[] filePath = getFilesPath(classification);
			for (int j = 0; j < filePath.length; j++) 
			{
				String text = getText(filePath[j]);
				if (text.contains(key)) 
				{
					ret++;
				}
			}
		}
		catch (FileNotFoundException ex) 
		{
			Logger.getLogger(TrainingDataManager.class.getName()).log(Level.SEVERE, null,ex);
	
		} 
		catch (IOException ex)
		{
			Logger.getLogger(TrainingDataManager.class.getName()).log(Level.SEVERE, null,ex);
	
		}
		return ret;
	}