During some distributed Java development, my colleague observed that a NotSerializableException was encountered when he tried to pass the Set returned from Map ‘s (HashMap in particular in this ...

Contribute to AbstractClassroom-Java/nested-hashmap-mysql development by creating an account on GitHub.

Contribute to AbstractClassroom-Java/nested-hashmap-mysql development by creating an account on GitHub.

In Java, nested classes are categorized as either static member classes or inner classes. Inner classes are non-static member classes, local classes, or anonymous classes.

HashMap vs. Hashtable similarities Both the Hashtable and HashMap implement the Map interface and both share the same set of methods used to add, remove and manipulate elements of a key-value, ...