Introductio with Collection Framework

Introductio with Collection Framework:

Collection is an Interface ... which provide us a well defined set of interfaces and classes to handle  and manipulate a group or collection of objects.

List and Set  are Interfaces and  both of them extends the Collection Interface.

List : --List is an ordered collection of objects which has the indexing property  and allows  duplicates...
The methods includedin it are given in the table bellow....
        

void	add(int index, Object element) Inserts the specified element at the specified position in this list (optional operation).
boolean	add(Object o) Appends the specified element to the end of this list (optional operation).
boolean	addAll(Collection c) Appends all of the elements in the specified collection to the end of this list, in the order that they are returned by the specified collection's iterator (optional operation).
boolean	addAll(int index, Collection c) Inserts all of the elements in the specified collection into this list at the specified position (optional operation).
void	clear() Removes all of the elements from this list (optional operation).
boolean	contains(Object o)           Returns true if this list contains the specified element.
boolean	containsAll(Collection c) Returns true if this list contains all of the elements of the specified collection.
boolean	equals(Object o) Compares the specified object with this list for equality.
Object	get(int index) Returns the element at the specified position in this list.
int	hashCode() Returns the hash code value for this list.
int	indexOf(Object o) Returns the index in this list of the first occurrence of the specified element, or -1 if this list does not contain this element.
boolean	isEmpty() Returns true if this list contains no elements.
Iterator	iterator() Returns an iterator over the elements in this list in proper sequence.
int	lastIndexOf(Object o) Returns the index in this list of the last occurrence of the specified element, or -1 if this list does not contain this element.
ListIterator	listIterator() Returns a list iterator of the elements in this list (in proper sequence).
ListIterator	listIterator(int index) Returns a list iterator of the elements in this list (in proper sequence), starting at the specified position in this list.
Object	remove(int index) Removes the element at the specified position in this list (optional operation).
boolean	remove(Object o) Removes the first occurrence in this list of the specified element (optional operation).
boolean	removeAll(Collection c) Removes from this list all the elements that are contained in the specified collection (optional operation).
boolean	retainAll(Collection c) Retains only the elements in this list that are contained in the specified collection (optional operation).
Object	set(int index, Object element) Replaces the element at the specified position in this list with the specified element (optional operation).
int	size() Returns the number of elements in this list.
List	subList(int fromIndex, int toIndex) Returns a view of the portion of this list between the specified fromIndex, inclusive, and toIndex, exclusive.
Object[]	toArray() Returns an array containing all of the elements in this list in proper sequence.
Object[]	toArray(Object[] a) Returns an array containing all of the elements in this list in proper sequence; the runtime type of the returned array is that of the specified array.

Class which impelements List...are ArrayList and LinkedList

Set :-- Set is  a collection of unique objects which forbids  duplicate objects..

the methods included in Set are given in the table below...

boolean	add (Object o) Ensures that this collection contains the specified element (optional operation).
boolean	addAll(Collection c) Adds all of the elements in the specified collection to this collection (optional operation).
void	clear() Removes all of the elements from this collection (optional operation).
boolean	contains(Object o) Returns true if this collection contains the specified element.
boolean	containsAll(Collection c) Returns true if this collection contains all of the elements in the specified collection.
boolean	equals(Object o) Compares the specified object with this collection for equality.
int	hashCode() Returns the hash code value for this collection.
boolean	isEmpty() Returns true if this collection contains no elements.
Iterator	iterator() Returns an iterator over the elements in this collection.
boolean	remove(Object o) Removes a single instance of the specified element from this collection, if it is present (optional operation).
boolean	removeAll(Collection c) Removes all this collection's elements that are also contained in the specified collection (optional operation).
boolean	retainAll(Collection c) Retains only the elements in this collection that are contained in the specified collection (optional operation).
int	size() Returns the number of elements in this collection.
Object[]	toArray() Returns an array containing all of the elements in this collection.
Object[]	toArray(Object[] a) Returns an array containing all of the elements in this collection; the runtime type of the returned array is that of the specified array.

Class which impelements set...Hashset and TreeSet.
Vector :--  A Vector is an historical collection class that acts like a growable array, but can store heterogeneous data elements.It is synchronized and thread safe.

Map :--  Map is  also an interface but not extends the Collection Interface.It is a key-value association of objects with unique key .

Class Which Implements Map ... Hashmap and TreeMap....