Obba provides a bridge from Speadsheets (Excel or OpenOffice) to Java classes.

With Obba, you can easily build Speadsheet GUIs to Java code.

Its main features are:
  • Loading of arbitrary jar or class files at runtime through an Excel/OpenOffice worksheet function.
  • Instantiation of Java objects, storing the object reference under a given object label.
  • Invocation of methods on objects referenced by their object handle, storing the handle to the result under a given object label.
  • Asynchronous method invocation and tools for synchronization, turning your spreadsheet into a multi-threaded calculation tool.
  • Serialization and de-serialization (save Serializable objects to a file, restore them any time later).
  • All this though spreadsheet functions, without any additional line of code (no VBA needed, no additional Java code needed).
  • Spreadsheets using Obba to refer to Java libraries can be easily migrated from Excel to OpenOffice and back!
For a more detailed introduction see the Obba documentation on the Obba homepage.

Version 1.9.28 of Obba brings the following changes:
  • Arrays of objects can be created using obMake with a class name of ClassName[] where ClassName is the component type (see documentation for an example).
  • Added a window to the Obba Control Panel which visualizes the objects and their dependencies in a graph. The dependencies are determined by the objects used during construction an object.