You want Bar to be passed a function to call, but not use it on construction, only on the callbacks from the GUI widget. That function must end up being an actual method somewhere (it's Java, ...

I wrote about the NetBeans hint “Overridable Method Call in Constructor” in the blog post Seven Indispensable NetBeans Java Hints. In this post, I look at why having an overridable method called from ...

The new JavaServer Pages (JSP) version incorporates the expression language (EL) introduced by the JSP Standard Tag Library (JSTL) to let Web designers produce scriptless JSP pages that don’t contain ...