public void writePreAndIn()
	{
		try
		{
			mPreorderOut = new PrintWriter(preorderFilePath);
			mInorderOut = new PrintWriter(inorderFilePath);
			treversePreorderWrite(mRoot);
			treverseInorderWrite(mRoot);
		}
		catch (FileNotFoundException e)
		{
			e.printStackTrace();
		}
		finally
		{
			this.mPreorderOut.close();
			this.mInorderOut.close();
		}
	}