Because enums are automatically Serializable (see Javadoc API documentation for Enum), there is no need to explicitly add the "implements Serializable" clause following the enum declaration. Once this is removed, the import statement for the java. io. Serializable interface can also be removed.

Should POJO implements Serializable?

Mostly JPA implementations do run in Distributed manner and Use caching, thus this POJO is required to implement Serializable. The term "POJO" was invented to seperate between lightweight and heavyweight EJB concepts. POJOs do not require you to implement anything.

What will happen if we don't implement Serializable?

3 Answers. The Student would not be Serializable, and it will act like a normal class. Serialization is the conversion of an object to a series of bytes, so that the object can be easily saved to persistent storage or streamed across a communication link.