public boolean addVertex(V vertex) { if (vertexMap.containsKey(vertex)) { return false; } else { vertexMap.put(vertex, new VertexInfo<>()); return true; } }
public boolean addVertex(V vertex) { if (vertexMap.containsKey(vertex)) { return false; } else { vertexMap.put(vertex, new VertexInfo<>()); return true; } }