How to resize Textarea?

Question

Java

Good afternoon! When resizing the window (this is to hold the mouse in the corner of the window), I need the Textarea to increase or decrease,
There is a frame on it panel, on this panel there are two more panels, on the top textarea on the bottom there are all sorts of buttons, when resizing, the textarea should be larger or smaller in sizes! I tried to increase all panels but it turns out that the panel on which the textarea hangs increases and the texterea does not. Everything is built using GrudBagLayout.