public final class GraphMLDemo
extends Object
This class demonstrates exporting and importing a graph with custom vertex and edge attributes in
 GraphML. Vertices of the graph have an attribute called "color" and a "name" attribute. Edges
 have a "weight" attribute as well as a "name" attribute.
 
 The demo constructs a complete graph with random edge weights and exports it as GraphML. The
 output is then re-imported into a second graph which is exported a second time.