question: public BarabasiAlbertGenerator ( Supplier < Graph < V , E > > graphFactory , Supplier < V > vertexFactory , Supplier < E > edgeFactory , int init_vertices , int numEdgesToAttach , Set < V > seedVertices ) { this ( graphFactory , vertexFactory , edgeFactory , init_vertices , numEdgesToAttach , ( int ) System . currentTimeMillis ( ) , seedVertices ) ; }
target:  Constructs a new instance of the generator, whose output will be an undirected graph, and which will use the current time as a seed for the random number generation.