How do I make rsyntaxtextarea not on full window?

[Ivan]

Description
How do I make rsyntaxtextarea not on full window?
For example I want to make text area (x: 0, y: 0, width: 150, height: 150).
But I can't find this method, and text area is always full screen.

Steps to Reproduce
Specific steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
Resize text area.

Actual behavior
No.

Screenshots
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Java version
18

Additional context
Add any other context about the problem here.

[Ivan]

note
jpanel
setbounds width height x y
jpanel add codearea