Dec 10, 2008 · Anonymous inner classes are effectively closures, so they can be used to emulate lambda expressions or "delegates". For example, take this interface: public interface F<A, B> { …

Feb 18, 2010 · In my view, 90% of inner classes in Java code are either entities that are associated with a single class and were thus "shoved in" as inner classes, or anonymous inner …

Mar 25, 2014 · An anonymous inner class (AIC) can be used to create a subclass of an abstract class or a concrete class. An AIC can also provide a concrete implementation of an interface, …

Feb 27, 2016 · One advantage of anonymous inner classes is that no one can ever use it anywhere else, whereas a named inner class can be used (if only by the class that created it if …

However, classes can reference variables from containing scopes. For an anonymous class these can be instance variables from the containing class (es) or local variables that are marked …

Only an effectively final variable can be used in an anonymous inner class or lambda expression though. It's basically due to the way Java manages closures. When you create an instance of …

Sep 16, 2008 · What is the main difference between an inner class and a static nested class in Java? Does design / implementation play a role in choosing one of these?

Closures in Java are Anonymous Inner Classes, like the Runnable you describe. Its a way to utilize a class (almost extend it) without writing a defined Class that extends Runnable. It's …

An anonymous inner class created in a static method will obviously be effectively static because there is no source for an outer this. There are some technical differences between inner …

May 20, 2012 · java.util.Comparator class says in compare method java doc: a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.