https://jmonkeyengine.org/
jMonkeyEngine
jMonkeyEngine is a modern developer friendly game engine written primarily in Java.
jmonkeyengine
https://wiki.jmonkeyengine.org/docs/3.9/contributions/gui/tonegodgui/evmousefocus.html
evmousefocus :: jMonkeyEngine Docs
jmonkeyenginedocs
https://wiki.jmonkeyengine.org/docs/3.4/core/material/j3m_material_files.html
Saving and Loading Materials with .j3m Files :: jMonkeyEngine Docs
Saving and Loading Materials with .j3m Files
saving and loadingmaterialsfilesjmonkeyenginedocs
https://wiki.jmonkeyengine.org/docs/3.3/contributions/lanscapes/vegetationsystem/grass.html
The grass system :: jMonkeyEngine Docs
grasssystemjmonkeyenginedocs
https://wiki.jmonkeyengine.org/docs/3.4/core/input/input_handling.html
Input Handling :: jMonkeyEngine Docs
input handlingjmonkeyenginedocs