The TreeMap data structure in Java is one of the most commonly used data structures for sorting and associating values with keys. It’s based on the concept of a binary search tree, where each node in ...

My best guess to what was causing this is that your TreeMap contained non-static inner class instances and that your outer class wasn't serializable or it contained a member that wasn't.

JVoroTreemap is a fast standalone java library which computes Voronoi treemaps. The following article contains most important references related to this implementation. Arlind Nocaj, Ulrik Brandes, ...

Implemented a TreeMap class that utilizes parent pointers and a dummy root node for efficient tree navigation and operations. The TreeMap class implements the Map interface and provides standard map ...