g.addEdge("is a", "Java", "Programming Language");
g.addEdge("is a", "Java", "Python");
g.addEdge("is a", "C#", "Programming Language");
g.addEdge("is a", "C++", "Programming Language");
g.addEdge("is a", "Perl", "Programming Language");
g.addEdge("is a", "Python", "Programming Language");
}
p.getNanoGraph().setLayout(new CircularLayoutAlgorithm(200));
DefaultNodeRenderer r = new DefaultNodeRenderer();
// r.setBodyColor(new GradientPaint(0,0,Color.YELLOW, 600, 600, Color.RED));