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[bounil bilel]

Hello

in order to create a multigraph I used the JUNG Library (and the same tutorial code )but while coding i received this problem "type graph does not take parameters" in this line “ Graph<Integer, String=""> g;
and i can't find any solution to solve the problem in this code :

import edu.uci.ics.jung.algorithms.layout.CircleLayout;
import edu.uci.ics.jung.algorithms.layout.Layout;
import edu.uci.ics.jung.graph.Graph;
import edu.uci.ics.jung.graph.SparseMultigraph;
import edu.uci.ics.jung.visualization.BasicVisualizationServer;
import edu.uci.ics.jung.visualization.layout.*;
import java.awt.Dimension;
import javax.swing.JFrame;

public class Simpleg {

Graph<Integer, String=""> g;
/* Creates a new instance of SimpleGraphView /
public Simpleg() {
// Graph<V, E=""> where V is the type of the vertices and E is the type of the edges
g = new SparseMultigraph<Integer, String="">();
// Add some vertices. From above we defined these to be type Integer.
g.addVertex((Integer)1);
g.addVertex((Integer)2);
g.addVertex((Integer)3);
// Note that the default is for undirected edges, our Edges are Strings.
g.addEdge("Edge-A", 1, 2); // Note that Java 1.5 auto-boxes primitives
g.addEdge("Edge-B", 2, 3);
}

public static void main(String[] args) {
Simpleg sgv = new Simpleg(); //We create our graph in here
// The Layout<V, E=""> is parameterized by the vertex and edge types
Layout<Integer, String=""> layout = new CircleLayout(sgv.g);
layout.setSize(new Dimension(300,300)); // sets the initial size of the layout space
// The BasicVisualizationServer<V,E> is parameterized by the vertex and edge types
BasicVisualizationServer<Integer,String> vv = new BasicVisualizationServer<Integer,String>(layout);
vv.setPreferredSize(new Dimension(350,350)); //Sets the viewing area size

JFrame frame = new JFrame("Simple Graph View");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(vv); 
frame.pack();
frame.setVisible(true);

}

}

can you help me please

Envoyé depuis Windows Mail

[Sachin]

Following code works perfectly.
I really don't understand why have you put ="" after String
for each edge type parameter.
I am using java 6 where ="" results an error but not otherwise.

import edu.uci.ics.jung.algorithms.layout.CircleLayout;
import edu.uci.ics.jung.algorithms.layout.Layout;
import edu.uci.ics.jung.graph.Graph;
import edu.uci.ics.jung.graph.SparseMultigraph;
import edu.uci.ics.jung.visualization.BasicVisualizationServer;
import edu.uci.ics.jung.visualization.layout.*;
import java.awt.Dimension;
import javax.swing.JFrame;

public class Simpleg {

Graph<Integer, String=""> g;
/ Creates a new instance of SimpleGraphView /
public Simpleg() {
// Graph<V, E=""> where V is the type of the vertices and E is the type of the edges
g = new SparseMultigraph<Integer, String="">();
// Add some vertices. From above we defined these to be type Integer.
g.addVertex((Integer)1);
g.addVertex((Integer)2);
g.addVertex((Integer)3);
// Note that the default is for undirected edges, our Edges are Strings.
g.addEdge("Edge-A", 1, 2); // Note that Java 1.5 auto-boxes primitives
g.addEdge("Edge-B", 2, 3);
}

public static void main(String[] args) {
Simpleg sgv = new Simpleg(); //We create our graph in here
// The Layout<V, E=""> is parameterized by the vertex and edge types
Layout<Integer, String=""> layout = new CircleLayout(sgv.g);
layout.setSize(new Dimension(300,300)); // sets the initial size of the layout space
// The BasicVisualizationServer<V,E> is parameterized by the vertex and edge types
BasicVisualizationServer<Integer,String> vv = new BasicVisualizationServer<Integer,String>(layout);
vv.setPreferredSize(new Dimension(350,350)); //Sets the viewing area size

JFrame frame = new JFrame("Simple Graph View");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(vv);
frame.pack();
frame.setVisible(true);

}