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Is that possible to write our own marker interface in java. I am writing a code like
public interface MyMarker {
}
Is that a marker interface?
If it is possible then how can I let JVM know that this interface is my own created marker interface?
Yes, that’s a marker interface. You would test whether an object “implemented” it as simply as:
For a particular class (instead of object) you’d want
You should consider using annotations instead of marker interfaces though. They’re not always direct replacements, but in many cases they’re used for the same goals, and annotations are (IMO) cleaner.