I've been wondering if there's a class in LWJGL 3 similar to JComponent that I can import and use for a game character. I know that Blender models can be imported easily, but I'm wondering if there's a way for an class to extend some overarching LWJGL class, overriding some method in order to display as a 3D object (in the same way a class might extend JComponent and override paintComponent(Graphics)). LWJGL 3 doesn't yet support Swing/AWT, so I can't use actual JComponents like I used to. Thanks for the help!
No. LWJGL is GLFW(for opening windows), OpenGL(for using the graphics card) and OpenAL(for sound) for Java. You'll have to learn OpenGL and write some GLSL shaders to get anything drawn.