Something

	private static ListGraph createGraph(String filename) throws IOException {		 ListGraph graph = null;		 Scanner in = new Scanner(new File(filename));		 		 String tmp = in.nextLine();		 while(tmp != null) {			 if(tmp.length() > 0) {			 	String[] data = tmp.split(" ");			 			 	if(data.length == 1 && isInt(data[0])) {			 		graph = new ListGraph(Integer.parseInt(data[0]));			 	} else if(data.length > 2 && isInt(data[0]) && isInt(data[1]) && isInt(data[2])) {			 		graph.addEdge(Integer.parseInt(data[0]), Integer.parseInt(data[0]), Integer.parseInt(data[0]));			 	}			 }			 			 tmp = in.nextLine();		 }		 		return graph;	}