A presentation which finds out the difference between Java primitive variables and Java objects. ~ Wasif Altaf

3. Yes Or
NO!

4. Java Language
Specifications

5. :: DEFINITIONS ::
4.12 Variables: A variable is a storage
location and has an associated type,
sometimes called its compile-time type,
that is either a primitive type (§4.2) or a
reference type (§4.3).

6. :: DEFINITIONS ::
4.12.1 Variables of Primitive Type: A
variable of a primitive type always holds a
value of that exact primitive type.

7. :: DEFINITIONS ::
4.12.2 Variables of Reference Type: A
variable of a class type T can hold a null
reference or a reference to an instance
of class T or of any class that is a subclass of
T.

8. Are
Variables
Objects?
NO!

9. Byte
Float
Integer
Type Wrapper Classes
Long
Character
Double

10. Boxing
valueOf( type arg )
AutoBoxing
intValue( )
charValue( )
booleanValue( )
Unboxing

11. :: EXAMPLE ::
Integer x , y ;
x = 12 ;
y = 15 ;
System.out.println( x + y );

12. Are
Variables
Objects?
NO!
NO!
NO!

13. :: REFERENCES ::
http://java.sun.com/docs/books/jls/download/langspec-3.0.pdf
http://www.javaranch.com/campfire/StoryCups.jsp
http://www.javaranch.com/campfire/StoryPassBy.jsp
http://java.sun.com/docs/books/tutorial/java/data/numberclasses.html
http://java.sun.com/j2se/1.5.0/docs/guide/language/autoboxing.html
http://forums.sun.com/thread.jspa?threadID=5387311

14. Discussion

15. Thanks