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Collection Frame Work (CFW) or
Collections
Collection frame work is one of the
additional service or add-on service developed by sun micro systems and added
as a part of jdk for enhancing the performance of java applications.
Definition:
Collection Framework is
standard mechanism of java which allows us to prove or gather different type of
values or similar type of values or both the type of values in single
variable with dynamic size in nature.
This single variable is known as Collection Frame Work variable.
In order to deal with Collection frame work programming we must
import a predefined package called java.util.*
Difference between Arrays and Collection Frame
Work
An array is a
collective name given to a group of consecutive memory location which all
referred by similar type or homogenous values.
The concept of array containing only homogenous values but not
heterogeneous values. And the concept of
arrays contains only fixed size.
Collection Framework is
standard mechanism of java which allows us to prove or gather different type of
values or similar type of values or both the type of values in single
variable.
It allows us to take both heterogeneous and homogeneous values. And the concept of arrays
contains only dynamic size.
Advantages
Of Collection Frame Work :
1)
Collection Frame work provides high performances to java
applications.
2)
Collection frame work provides adaptability.
Definition : The process of adding the content of one collection frame work
variable to another collection frame variable either in the beginning or in the
last or in the middle.
3)
Collection frame work is always extendable. (Depends on the
incoming flow of data, if size of the collection frame work variable dynamically
then it is known as Extendable.).
4)
Collection frame work is one of the algorithmic oriented
4.1) Collection frame work contains built – in sorting
techniques.
4.2) Collection frame work contains built – in searching
techniques.
4.3) Collection frame work contains built – in preliminary
concepts.
New Collection Frame:
The revised form of data structures concet
is known as New Collection Frame Work.
New Collection Frame Work is divided into two types.
1) 1D/Single CFW.
2) 2D/Double CFW.
1) 1D CFW/Single CFW:
1D CFW is one in which the
data is organizing in the form of either row or column both not in the form of
(key,value) pair.
1D Collection Frame
Work Interfaces :
d)
Java.util.Sortedset
Data Extraction Interfaces are as follows :
1) Iterator (I)
2) ListIterator(I)
1 - D Collection frame work classes are
1) LinkedList
2) ArrayList
3) HashSet
4) TreeSet
5) HashMap
6) TreeMap
Data Extraction Interfaces are as follows :
1) Iterator (I)
2) ListIterator(I)
1 - D Collection frame work classes are
1) LinkedList
2) ArrayList
3) HashSet
4) TreeSet
5) HashMap
6) TreeMap
2) 2D CFW/Double CFW:
2D CFW is one in which the data is
organizing in the form of (key,value) pair or rows and columns.
In (key,value) pair,the value of key is must be unique/distinct and
value of value may or may not be unique.
Classes and Interfaces in 2 - D collection frame work are as :
1) Java.util.Map (I)
2) Java.util.Map.Entry (C)
3) Java.util.SortedMap (I)
To know about these interfaces and class CLICK HERE TO VIEW
Classes and Interfaces in 2 - D collection frame work are as :
1) Java.util.Map (I)
2) Java.util.Map.Entry (C)
3) Java.util.SortedMap (I)
To know about these interfaces and class CLICK HERE TO VIEW
Legacy
CollectionFrameWork :
The earlier versions of java the concept of collection frame work was known as
data structures. The concept of data structures was able to fulfill pure
requirements of industry and unable to fulfill some other requirements of
industry. Hence the concept of data structures was reengineered to the industry
on the name of new collectionframework and the existing data structures was
renamed as Legacy Collectionframework.
Legacy CollectionFrameWork
contains two types.
1) 1 – D / single collection frame work.
2) 2 – D /double collection frame work.
As part
of legacy collection frame work we have the following interface and classes.
1) Enumeration (I).
2) Vector (1 – D)©
3) Stack (1 – D)©
4) Dictionary (2 – D)Abstract©
5) HashTable(2 – D)©
6) Properties(2 – D) ©
To read the values dynamically from keyboard their is a class.
Java.util.Scanner or Scanner class
To read the values dynamically from keyboard their is a class.
Java.util.Scanner or Scanner class
Collection Frame Work In Java Pdf and Ppt Format:
Here itself we can find the collections pdf and ppt format by clicking the below link we can view it and download.
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