// All Rights Reserved. Copyright (C) Kazuo Misue (2010)

import edu.uci.ics.jung.graph.Graph;
import edu.uci.ics.jung.graph.UndirectedSparseGraph;

public class Sample1a {

    public static void main(String[] args) {
        Graph<Integer,Integer> graph = new UndirectedSparseGraph<Integer,Integer>();
        graph.addVertex(1);
        graph.addVertex(2);
        graph.addVertex(3);
        graph.addEdge(101, 1, 2);
        graph.addEdge(102, 2, 3);
        System.out.println("Graph G = " + graph.toString());
    }

}