• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Jeanne Boyarsky
  • Ron McLeod
  • Paul Clapham
  • Liutauras Vilda
Sheriffs:
  • paul wheaton
  • Rob Spoor
  • Devaka Cooray
Saloon Keepers:
  • Stephan van Hulst
  • Tim Holloway
  • Carey Brown
  • Frits Walraven
  • Tim Moores
Bartenders:
  • Mikalai Zaikin

Difference !!!

 
Ranch Hand
Posts: 113
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi friends can anyone say me the difference between "Null" and "Empty"
 
Sheriff
Posts: 67746
173
Mac Mac OS X IntelliJ IDE jQuery TypeScript Java iOS
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Empty is when you finish your can of Coke. Null is when you never had a can to begin with.
 
Ranch Hand
Posts: 134
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi,

Take this example


In the first case for 'nullStr', no String object is been created, whereas for 'emptyStr' a String object is created with value being empty.
 
Ganesh Kumar
Ranch Hand
Posts: 113
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Than you all!! friends
 
Sheriff
Posts: 14691
16
Eclipse IDE VI Editor Ubuntu
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator

Empty is when you finish your can of Coke. Null is when you never had a can to begin with.


And you can crush an empty can, while you cannot crush a can you don't have.

So, reusing Shankar's code :
 
Ranch Hand
Posts: 3389
Mac MySQL Database Tomcat Server
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Null - Nothing is in real existence.

Empty - There is an Object in existence but with no content (empty). Like a Bus with no passengers, a cup with no juice etc.

HtH.
 
Greenhorn
Posts: 5
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Null is like an empty but not actually an empty...

Hence, empty is like an empty only...

Have you got it ganesh...
 
Marshal
Posts: 79179
377
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Null is like an empty but not actually an empty?

Confusing.
 
Ranch Hand
Posts: 228
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator

Originally posted by bala kris:
Null is like an empty but not actually an empty...

Hence, empty is like an empty only...

Have you got it ganesh...



I got It !


[ July 13, 2007: Message edited by: Sheethal Reddy ]
 
reply
    Bookmark Topic Watch Topic
  • New Topic