dearimgui Open-Source Projects
JNI based binding for Dear ImGuiProject mention: GUI in LWJGL | reddit.com/r/opengl | 2021-05-04
If you want a library that has an active community and a lot of examples try out imgui (java port: https://github.com/SpaiR/imgui-java). It is a C based language but seems like the port are pretty close to the original api so you can follow not only the java docs but the c/c++ ones as well. There are a few game engines that utilizes imgui in the editor because it is lightweight, easy to extend, theme and use.