preview

Java Collection Framework Is Used For Representing And Manipulating Collections

Better Essays
Open Document

JAVA COLLECTION FRAMEWORK
INTRODUCTION:
Groups of multiple elements into a single unit are known as a collection is an object. It easily store, retrieve and manipulating data, it transmit data from one method to another method.
COLLECTION FRAMEWORK:
Unified architecture is used for representing and manipulating collections very easily. There are three things contains by collection framework and i.e.
• Interfaces
• Algorithms
• Implementations
COLLECTION FRAMEWORK DIAGRAM: INTERFACES:
First we like to define fundamental methods
• int size ( ) ;
• boolean empty ( ) ;
• boolean contains ( Object element ) ;
• boolean add ( Object element ) ; / / this step is optional
• boolean remove ( Object element ) ; / / this step is optional
• iterator iterator ( ) ;
Second I would like to inform you that these methods are the basic behavior of a collection.
The elements in the collection provide an iterator to step.
ITERATOR INTERFACE:
There are three fundamental methods
• Object next ( )
• Boolean hasNext ( )
• Void remove ( )
These methods are use to provide access to the content of the collection.
ITERTOR POSITION: EXAMPLE OF SIMPLE COLLECTION:
Public class SimCol
{
Public static void main ( String [ ] args ) { Collection a; a = new ArrList ( ); System.out.println ( a.hetClass ( ) .getName ( ) ) ; For ( int i=1 ; I <= 10 ; i++ ) { a.add ( I + “ * “ + I + “ = “ +i*i); }
Iterator ite = a.iterator ( ) ;
While ( ite.hasnext ( ) ) System.out.println ( ite.next ( ) ) ; }

Get Access
Related
Get Access