What a format is this?

i like to know if this is an special common format or just a simple selfgenerated config file:

scenes : {
  Scene : {
    class : Scene
    sources : {
      Game Capture : {
        render : 1
        class : GraphicsCapture
        data : {
          window : "[duke3d]: Duke Nukem 3D Atomic Edition 1.4.3 STABLE"
          windowClass : SDL_app
          executable : duke3d.exe
          stretchImage : 0
          alphaBlend : 0
          ignoreAspect : 0
          captureMouse : 1
          invertMouse : 0
          safeHook : 0
          useHotkey : 0
          hotkey : 123
          gamma : 100
        }
        cx : 1920
        cy : 1080
      }
    }
  }
}

My background is, that i like to read in multiple files like this one above. And i don't like to implement a hole new parser for this. That's why i want to fall back on java libraries which have allready implemented this feature. But without being aware of such code formats, it's quite difficult to search for this libraries. :D

thx in advance