Why there are some null interface in java ? What does it mean ? Give me some null interfaces in JAVA?

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Null interfaces act as markers.they just tell the compiler that the objects of this class need to be treated differently.some marker interfaces are : Serializable, Remote, Cloneable

Java provides null interface that mean interface without body initialization .These interface are called marker interface. Ans it is also a flag for JVM in java which provides some specialization.interface A {

}

Null interfaces are act as makers ...they just tell the complier that the objects treated as a differently by JVM...Examples of null interfaces is serializable ,remote,Cloneable

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Its an interface without a method in it.

Another name of null interface is marker interface. In some marking is enough to give jvm or other packages to what to do with that class or object, like Serializable, Cloneable, etc. Some time it use just mark and handle with interface rather using actual class.

Interfaces in java are a contract binding for any class that implements it, so for example an interface has a contract sayHello(), every implementing class has a binding to give it's implementation. This gives the concept of the great "Program to Interface".

Null interfaces in java are a special type of interfaces which help for some special treatment. They don't have any method declarations in them and are used for some kind of identification. Also called as Marker interfaces. Examples include Serializable, Cloneable.

Hope this helps.

A null interface is an interface with no methods in it. But it's used to perform special tasks. For example, Serializable is a null interface; when a class implements this interface the JVM knows that its objects should be treated in a special way.