What is vector class?

[chinmay.sahoo]

Vector class provides the capability to implement array of objects.

[TomClarke]

A vector class implements the dynamic  array  that can grow and shrink at run time (dynamically). It resembles the implementation of ArrayList with a difference that vector is synchronized.

[Paavni]

The Vector class implements a dynamic array. In the vector class, a component is stored at an integer index and it can be accessed by this index number like an Array. A Vector is synchronised and it contains many legacy methods that are not part of the collection framework.

[saravjeet]

A Vector class implements the dynamic array that can grow and shrink at run time (dynamically). ... The Vector class implements an incremental array of objects.