Java Interview Question And Answer What is Marker Interface Explain Java Interview

Published: 30 November 2013
on channel: Interview DOT

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What is "Marker Interface" in Java ? Java Interview Question And Answer

Marker interface is used as a tag to inform a message to the java compiler so that it can add special behaviour to the class implementing it. Java marker interface has no members in it.

For example "java.io.Serializable" marker interface. It does not has any members defined it it. When a java class is to be serialized, you should intimate the java compiler in some way that there is a possibility of serializing this java class.

"we are intimating the java compiler to add a special behaviour for the class marked with Interface"

"An interface is called a marker interface when it is provides an intimation to the compiler so that java compiler can provide special behaviour to it at runtime and they do not have any method declarations".
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