Question

What is the difference between List and Set in JAVA?

Answer 1

The List and Set both extend the collection interface. However, there are some differences between them both which are listed below.

• The List can contain duplicate elements whereas Set includes unique items.
• The List is an ordered collection that maintains the insertion order whereas Set is an unordered collection that does not preserve the insertion order.
• The List interface contains a single legacy class which is the Vector class whereas the Set interface does not have any legacy class.
• The List interface can allow n number of null values whereas the Set interface only allows a single null value.