Instance Variables

Instance Variables

• If value of variable is changing from one object to another object that type of variable is known as instance variable.
• We can define instance variable are inside the class and outside of any method/block/constructor.
• If we didn't provide the values for instance variable then JVM will provide default values to instance variables.

Note 

• The possibility of declaration of instance variables.
• final
• abstract
• static
• strictfp
• synchronized
• native.

--------------------------------------------------------------------------

Program        :       Sample program on instance variable

Program name:        VarDemo1.java

Output            :        

                             Id is : 1

     Name is : Subbu

    

     Id is : 2

     Name is : Basha                               

class Master

{

     int id;

     String name;

}

class VarDemo1

{

        public static void main(String args[])

        {

               Master m1 = new Master();

               m1.id = 1;

               m1.name = “Subbu”;

               Master m2 = new Master();

               m2.id = 2;

               m2.name = “Basha”;

               System.out.println("Id is : "+m1.id);

               System.out.println("Name is : "+m1.name);

               System.out.println();

               System.out.println("Id is : "+m2.id);

               System.out.println("Name is : "+m2.name);

        }

}

Compile          :      javac VarDemo1.java

Run                :      java VarDemo1

Output            :        

                            Id is : 1

    Name is : Subbu

    

    Id is : 2

    Name is : Basha                               

--------------------------------------------------------------------------
Thanks for your time.

Nireekshan