Also here is Node Graph Interace to OpenSCAD in Java.[1]

FTR, I may recommend take a look on VisualScriptCAD[2] and DynFreeCAD[3].

[0] https://forum.openscad.org/Graphscad-A-New-Nodal-editor-for-...

[1] https://github.com/studiotc/NodeGraphInterface

[2] https://github.com/kovacsv/VisualScriptCAD

[3] https://github.com/infeeeee/DynFreeCAD