Marker Interface Java

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What is the Purpose of Marker Interface in Java?

Posted 19-May-11 20:22pm

pankaj88

Updated 27-Mar-18 23:34pm

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4 solutions

Solution 4

In my practice once a marker interface was really very helpful. When I have a project with many independents modules and one core module and need to execute some operations with some of modules in core module. For required classes I implement this marker interface and then in core module only write a check a class

Java

instanceof

interface if yes than execute actions.

Posted 22-Jan-15 9:24am

alexey_s

Updated 22-Jan-15 9:33am

v2

Solution 2

Marker Interface is an Interface which doesn't have any methods which is used to perform certain functionality Ex: Serializable is a marker interface which is used to perform operations like serialzation and deserization

Posted 17-Jul-11 21:10pm

sai4u

Updated 17-Jul-11 21:18pm

v2

Solution 3

Often you will come across interfaces in Java that have no behavior. In other words, they are just empty interface definitions. These are known as marker interfaces.

Posted 13-Jan-14 11:18am

Vivek Vermani

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Peter_in_2780 · Accepted Answer · 2011-05-19T20:30:00

Solution 1

See here[^] for a description of the Marker Interface pattern, and a comment about why it is not a good idea. There is a better alternative (annotations) introduced in Java 5. (Also available in .NET, under a different name.)

Posted 19-May-11 20:30pm

Peter_in_2780

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Dalek Dave 20-May-11 2:55am

Nice answer.