hi, please help me to answer this question. which is from an interview .Why there are some null interfaces in Java? What does it mean? Give some null interface in Java?
I've never heard the term "null interface" but I'm betting the interviewer meant "empty" or "tagging" interfaces, like java.io.Serializable or java.lang.Cloneable. Both of these interfaces declare no methods; by implementing them, a class signals some fact to the JVM (either it's OK to serialize it, or it's ok to clone it.)
