Java Collection Framework

If you have ever used for ex. an ArrayList or Linklist you have definitely used The Java Collection Framework.

Java Collection Framework [JCF]- A group of interfaces and classes. The classes allows user to use operation to store and manipulate a collection.

Java Collection Framework Interface

• List
  • Classes which implements the list interface
    • ArrayList
    • LinkedList
• Sets
  • Classes which implements the sets interface
    • TreeSet
    • HashSet
    • LinkedHashSet
• Maps
  • Classes which implements the maps interface
    • HashMaps
    • TreeMaps

List Interface

List Interface – is a set of signatures(change or provide a definition) that allows implementation of a linear list.

The top signature of List Interface

• add () – add an object to the list
• clear() – remove all elements from the list
• get (int e) – returns the element in index e
• remove (int e) – remove the elements in index e
• size () – returns the size of the list

Sets Interface

Sets Interface – is a list of signatures(change or provide a definition) that allow implementation of an unsorted list that can’t have any duplicate elements

Conclusion

Java Collection interface provide a blueprint for classes. Classes which implements the java collection interface share a standards method for grouping java object, making accessing the element of these collection less cumbersome.