The following code is presented in a book.
I do not understand the code between the line A and B, specifically creation (by "new") and definition of a class are combined together.
I usually see code that the class is defined first, then it is created (by "new") later.
Is there a name for this style of coding?
Typically, when a class is created, the keyword "new" is followed by a constructor call, and that's the end of the line.
An anonymous inner class adds a class body immediately after the constructor. Note that the end-of-line semicolon is still required!
The resulting instance is a type that has no name (and is therefore anonymous) but is a subclass of the named constructor. The reference is upcast to the constructor type. And due to polymorphism, the instance will behave according to the anonymous class definition.
(Note: Because the anonymous class is a subtype that is overriding methods, an abstract class or interface can be used as the supertype.)
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