Important of Static Keyword in Java Programming

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Presentation on Static keyword

• By javabykiran, Pune

Website www.javabykiran.com Contact 8888558802
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Static Keyword in

• JAVA

Website www.javabykiran.com Contact 8888558802
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About Us

• www.javabykiran.com

• Having experience in teaching Java for more than
  8 years on part-time basis. Has more than 12
  years of work experience in IT industry. Till now
  many projects have been successfully completed
  and has given guidance to more than 4000 students.

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Things to Remember
JBK

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• Static is a keyword used for memory management
• Static means single copy storage for variable or
  method
• Static keyword can be applied to variables,
  methods, inner class and blocks
• Static members belongs to class rather than
  instance of class

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Things to Remember
JBK

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• Static in java is a keyword that indicates that
  the variables or functions are shared between all
  the instances of a particular class since it
  belongs to the type, not the object. It is used
  when the programmer wants to share the same
  variable or method of a class.

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Static Variable
JBK

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• The variable preceded by static keyword is
  static variable
• static int a10 //variable
• static void m1()
• // method
• Static variable is used to refer common
  property of all objects of class

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How to access static variable?
JBK

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• There are two ways to access static variable
• Static variable can be accessed by Class name
• A. a A is class name
• Where A is the class name and a is a static
  variable declared in that class
• Static variable can be accessed by object
• I have a class name called Sample. Now, we
  can create the object of the Sample class
• Sample hnew Sample ()
• System.out.println(h.a) //a is static
  variable inside sample class

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JBK
How can I access static variable in two ways?
  package com.javabykiran.Static / _at_author Java By Kiran / public class Staticvar static int i10 public static void main(String args) Staticvar s new Staticvar() System.out.println(s.i) //Not Recommended System.out.println(Staticvar.i) //Recommended  
Output
10 10
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JBK
In the above program, we printed the value of
variable by using object name and by using class
name Static variable gets loaded into the
memory at the time of class loading So, we can
access static variable by reference variables as
well. In the above program, if we create only
the reference of class like Staticvar s1null
System.out.println(s1.i) // possible System.out
.println(Staticvar.i) //possible The above
example compiles and executes successfully
because the static variable get loaded into the
memory at the time of class loading Static
variable and method doesn't belong to
Object/Instance of the class since static
variables are shared across all the instances of
Object.
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Thank You.
JBK

• Javabykiran

• 8888558802

• javabykiran_at_gmail.com

• www.javabykiran.com