overriding methods without subclassing in Java

Question

I started on a new project recently and saw the usage of overriding like below for the first time.

public class SomeClass {
  public void myMethod() {
    XS         


        

Answer 1

The new implementation for

wrapMapper(MapperWrapper next)

method is limited for this instance xstream

XStream xstream

this type of overriding is creating a class that extends XStream, that's why it is called Anonymous, do not have a name and you can not have a reference for it.

Answer 2

Search Google for Anonymous Inner Class in Java

That's pretty useful to implement interfaces or abstract Class methods on concrete objects

That's heavily used when working with threading (Runnable class)

Answer 3

That's an Anonymous Inner Class.

Answer 4

That is called an "Anonymous class". You can find a lot of documentation about this special syntax on Internet. Good luck.

Answer 5

In this case the XStream class is an anonymous inner class. Then you're overriding the method of your anonymous XStream class.