java如何使用JUNG的注释系统注释我的图形？

Question

我似乎找不到任何关于注释我的荣格图的文档。我拼凑的最多的是：

AnnotationRenderer renderer = new AnnotationRenderer();
AnnotationPaintable annotate = new AnnotationPaintable(viewer.getRenderContext(), renderer);

Shape square = new Rectangle(0, 0, 50, 50);
Annotation<Shape> a = new Annotation<Shape>(square, Annotation.Layer.UPPER, null, true,
                new Point2D.Double(0, 0));
annotate.add(a);

如何在AnnotationPaintable对象中绘制实际注释