C:\jdk-15\bin>java -cp testopengl.jar Test1
Test1:
Setting up display.
Setting display title.
Setting display resizable.
Setting display background.
Setting display location.
Setting display pixel format.
Setting display buffer format.
Initializing OpenGL.
Extracting version.
Extracting extensions.
Extensions: 398
Creating OpenGL instances.
Checking FBO support.
Checking seamless cube map support.
Enabling seamless cube maps.
OpenGL initialization complete.
Test1 is running.
Test1 window opens.
C:\jdk-15\bin>java -cp testopengl.jar Test2
Test2:
Setting up display.
Setting display canvas.
Setting display title.
Setting display resizable.
Setting display background.
Setting display location.
Setting display pixel format.
Setting display buffer format.
Initializing OpenGL.
Extracting version.
Extracting extensions.
Extensions: 398
Creating OpenGL instances.
Checking FBO support.
Checking seamless cube map support.
Enabling seamless cube maps.
OpenGL initialization complete.
Test2 is running.
Test2 window opens.
Windows 10 Home 64bit, version 20H2, OS Build 19042.685, Experience 120.2212.551.0
nVidia driver is 460.79.
No problem, it would be nice to not have to mess with displays to open Spine.