isvertex returns true if the parameter `` vertex '' represents a vertex of the graph . running time : o 1 . concode_field_sep int numVertices concode_elem_sep DList vertices concode_elem_sep int numEdges concode_elem_sep HashTableChained verticeTable concode_elem_sep HashTableChained edgeTable concode_field_sep void removeEdge concode_elem_sep void removeVertex concode_elem_sep boolean isEdge concode_elem_sep int edgeCount concode_elem_sep int degree concode_elem_sep Object[] getVertices concode_elem_sep int weight concode_elem_sep void addVertex concode_elem_sep void addEdge concode_elem_sep int vertexCount concode_elem_sep Neighbors getNeighbors
boolean function ( Object arg0 ) { Entry loc0 = verticeTable . find ( arg0 ) ; if ( loc0 == null ) { return false ; } return true ; }