Why does getLineCount() count differently?

Question

Java

Hello.
In my first graphics program (text editor) I want to display a line counter.
The same line of code counts differently in two cases:
- when the program starts, the correct count is ;
- when loading a text file, the function counts by one less.

// obj_jlabLineCount - метка в которой все вывожу
// obj_jtaMAIN - компонент JTextArea
obj_jlabLineCount.setText("Line(s): " + (obj_jtaMAIN.getLineCount()));

I don't want to branch because I think it's stupid.
P.s. 1: I didn't find anything on Stackoverflow and docs.oracle.com.
P.s. 2: question on Stackoverflow with sample code
Ps. 3: problem solved - recreated the text file

Answer 1

obj_jtaMAIN

my eyes...