What Is Marking Interfaces Inwards Coffee Together With Why Required
Marker interface inwards Java is interfaces alongside no plain or methods or inwards uncomplicated give-and-take empty interface inwards coffee is called mark interface. Example of marketplace pose interface is Serializable, Clonnable as well as Remote interface. Now if mark interface doesn't convey whatsoever plain or method or demeanour they why would Java needs it? This was asked to my friend inwards 1 of his core coffee interview as well as and hence I idea to touching on based on it. In this article nosotros volition come across duo of argue on what mark interface do inwards Java as well as what is role of mark interface inwards Java. Marker interface are also called tag interface inwards Java.
What is Marker interfaces inwards Java as well as why required
Why Marker or Tag interface do inwards Java
1) Looking carefully on mark interface inwards Java e.g. Serializable, Clonnable as well as Remote it looks they are used to dot something to compiler or JVM. So if JVM sees a Class is Serializable it done unopen to exceptional functioning on it, similar agency if JVM sees 1 Class is implement Clonnable it performs unopen to functioning to back upwardly cloning. Same is truthful for RMI as well as Remote interface. So inwards curt Marker interface indicate, signal or a ascendancy to Compiler or JVM.
Where Should I role Marker interface inwards Java
Apart from using built inwards mark interface for making a course of pedagogy Serializable or Clonnable. One tin also railroad train his ain mark interface. Marker interface is a practiced agency to separate code. You tin do mark interface to logically split upwardly your code as well as if you lot convey your ain tool than you lot tin perform unopen to pre-processing functioning on those classes. Particularly useful for developing API as well as framework similar Spring or Struts.
After introduction of Annotation on Java5, Annotation is improve choice than mark interface as well as JUnit is a perfect example of using Annotation e.g. @Test for specifying a Test Class. Same tin also hold upwardly achieved yesteryear using Test mark interface.
Another role of mark interface inwards Java
One to a greater extent than role of mark interface inwards Java tin hold upwardly commenting. a mark interface called Thread Safe tin hold upwardly used to communicate other developers that classes implementing this mark interface gives thread-safe guarantee as well as whatsoever alteration should non violate that. Marker interface tin also aid code coverage or code review tool to uncovering bugs based on specified demeanour of mark interfaces.
Again Annotations are improve choice @ThreadSafe looks lot improve than implementing ThraedSafe mark interface.
In summary marker interface inwards Java is used to dot something to compiler, JVM or whatsoever other tool only Annotation is improve agency of doing same thing.
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