Application: gvSIG desktop

import java.util.ArrayList;

import javax.imageio.stream.FileImageOutputStream;

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

import edu.uci.ics.jung.graph.Vertex;

import edu.uci.ics.jung.graph.decorators.Indexer;

import edu.uci.ics.jung.graph.impl.DirectedSparseEdge;

import edu.uci.ics.jung.graph.impl.DirectedSparseVertex;

import edu.uci.ics.jung.graph.impl.SparseGraph;

	private File netFile = new File("c:/ejes.red");

	public Graph loadJungNetwork()

	{

		SparseGraph g = new SparseGraph();

		long t1 = System.currentTimeMillis();

		RandomAccessFile file;

		try {

			file = new RandomAccessFile(netFile.getPath(),

					"r");

			FileChannel channel = file.getChannel();

			MappedByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());

			buf.order(ByteOrder.LITTLE_ENDIAN);

			int numArcs = buf.getInt();

			int numEdges = buf.getInt();

			int numNodes = buf.getInt();

			// Nodes

			buf.position(24*numEdges + 12);

			for (int i=0; i < numNodes; i++)

			{

				GvNode node = readNode(buf);

				Vertex v = new DirectedSparseVertex();

//				v.addUserDatum("ID", node.idNode, UserData.CLONE);

//				v.addUserDatum("X", node.x, UserData.CLONE);

//				v.addUserDatum("Y", node.y, UserData.CLONE);

	//			v_locations.setLocation(v, new Point2D.Double(x.doubleValue(),y.doubleValue()));

				g.addVertex(v);				

			}

			Indexer indexer = Indexer.getIndexer(g);

			buf.position(12);

			for (int i=0; i < numEdges; i++)

			{

				GvEdge edge = readEdge(buf);

				int nodeOrig = edge.getIdNodeOrig();

				int nodeEnd = edge.getIdNodeEnd();

				Vertex vFrom = (Vertex) indexer.getVertex(nodeOrig);

				Vertex vTo = (Vertex) indexer.getVertex(nodeEnd);

				DirectedSparseEdge edgeJ = new DirectedSparseEdge(vFrom, vTo);

				g.addEdge(edgeJ);

			}

			long t2 = System.currentTimeMillis();

			System.out.println("Tiempo de carga: " + (t2-t1) + " msecs");

			return g;

		} catch (FileNotFoundException e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		} catch (IOException e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		}

		return null;

	}

		redLoader.loadJungNetwork();