What are the Legacy classes?

Early versions of java did not include Collections framework. Instead it defined several classes and one interface to store objects. When collection came these classes re-engineered to support the Collection interfaces. These old classes are known are legacy classes.
Legacy classes-Dictionary,HashTable,Properties, Stack, Vector
Legacy interface- Enumeration.

• Enumeration ---Interface
• Dictonary ------Abstract class
• Hashtable -----Concrete class
• Properties -----Concrete class
• Vector -----Concrete class
• Stack -----Concrete class


Only values- Stack, Vector
Key/value pair – Dictionary, HashTable, Properties


Enumeration interface:
It defines the method by which we can enumerate(obtain one at a time) through the elements. The legacy interface is suppressed by Iterator.
It has two methods:
Boolean hasMoreElements()
nextElement()