StO: Visualization of graph

TestDraw.java

import java.awt.Color;
import java.util.List;
import java.util.Random;
import org.graphstream.graph.Edge;

public class TestDraw {

    private final Random rand;
    private final List<SomeObjectWithNode> nodes;

    public TestDraw(List<SomeObjectWithNode> k) {
        this.nodes = k;
        rand = new Random();
    }

    public void adjust() {
        for (SomeObjectWithNode k : nodes) {
            k.n.addAttribute("ui.color", k.c);
            for (Edge e : k.n.getEdgeSet()) {
                float r = rand.nextFloat();
                float g = rand.nextFloat();
                float b = rand.nextFloat();
                Color randomColor = new Color(r, g, b);
                e.setAttribute("ui.color", randomColor);
            }
        }
    }
}

TestGs.java

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;
import org.graphstream.graph.Graph;
import org.graphstream.graph.Node;
import org.graphstream.graph.implementations.SingleGraph;

public class TestGs {

    public static void main(String[] args) {
        List<SomeObjectWithNode> a = new ArrayList<>();
        System.setProperty("gs.ui.renderer", "org.graphstream.ui.j2dviewer.J2DGraphRenderer");
        Graph g = new SingleGraph("test1");
        g.addAttribute("ui.quality");
        g.addAttribute("ui.antialias");
        g.addAttribute("ui.stylesheet", "node { fill-mode: dyn-plain; size: 10px;} "
                + "edge { fill-mode: dyn-plain; size: 2px;}");
        g.display();
        a.add(new SomeObjectWithNode(g.addNode(Integer.toString(0))));
        Node lastNode = g.getNode("0");
        for (int i = 1; i < 10; i++) {
            a.add(new SomeObjectWithNode(g.addNode(Integer.toString(i))));
            g.addEdge(Integer.toString(i - 1).concat(Integer.toString(i)), a.get(i).n, lastNode);
            lastNode = a.get(i).n;
        }
        TestDraw t = new TestDraw(a);
        while (true) {
            t.adjust();
            try {
                TimeUnit.SECONDS.sleep(2);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}