[mixmastamyk]

Layout managers were well established industry-wide by the 90s, which is where I started using them.

[switchbak]

Absolutely - Qt had already figured out how to do layout before Swing was much of a thing (AWT doesn't count, yuck).

[mixmastamyk]

I suspected AWT had layout managers as well, so looked it up:

https://docs.oracle.com/javase/8/docs/api/java/awt/class-use...

Believe that was there from the beginning, mid 90s.