The object passed to addActionListener() is instantiated from an anonymous class that implements the java.awt.event.ActionListener interface. Nested interfaces and classes.

this repo contains a bunch of java code snippets and examples covering topics like threading, networking, interfacing, fileI/O, anonymous class, event handling, GUI, abstraction, collection, exception ...

Java provides us with anonymous inner classes, which come in quite handy for this problem. Usually, when we derive a class, we can override existing methods by providing a new one: ...