Re: [jgrapht-users] How to color or label vertices using jgrapht libraries?

[Joris K. <de...@gm...>]

The graph libraries are generic and very well designed, so you can create
your own objects as vertices or edges. Simple (untested) example:

public class Example{
  public static void main(String[] args){
    SimpleGraph<ColorableVertex, DefaultEdge> graph=new SimpleGraph<>();
    graph.addVertex(new ColorableVertex(0));
    for(ColorableVertex v : graph.vertexSet(){
      v.setColor(Color.PINK);
    }
}

public class ColorableVertex{
  Color color;
  int id;
  public ColorableVertex(int id){ ... }
  public setColor(Color color){this.color=color;}
}

br,

Joris Kinable

On Thu, Aug 6, 2015 at 7:49 PM, Steven Barkin <ste...@sa...>
wrote:

> I am interested in writing a graph coloring algorithm using various types
> of directed and undirected graph classes provided by jgrapht. None of them
> seem to have an easy ability to do this within the graph class itself (e.g.
> DirectedSimpleGraph).
>
> My goal is to be able to traverse the graph object, and add/change various
> labels or colors to the vertices, without the need to store the vertex
> information outside the object itself - i.e. I would like to use or create
> methods such as "DirectedSimpleGraph.setColorToVertex(v, c), where v is a
> vertex. and c is the color which perhaps would be defined as an integer.
> Any leads or best practices advice would be greatly appreciated.
>
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