• 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

Autoboxing and references

 
Ranch Hand
Posts: 32
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
public static void main(String[] args) {

String a ="bla";
String b = "bla";

Integer c = new Integer(10);
Integer d = new Integer(10);

Integer e = 10;
Integer f = 10;

System.out.println("Strings :" + (a==b));
System.out.println("Integers :" + (c==d));
System.out.println("Integers autobox :" + (e==f));


}

}

This prints
Strings :true
Integers :false
Integers autobox :true

What I didn't expect is that when I used autoboxing, the references are the same... Aren't there 2 different Integer objects made ??
Can someone explain please ? Thanks.
 
Ranch Hand
Posts: 218
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
http://www.xyzws.com/faq.do?cat=faq&article=34
 
Bram Maes
Ranch Hand
Posts: 32
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Thanks! I didn't know that. Very useful link.
 
Consider Paul's rocket mass heater.
reply
    Bookmark Topic Watch Topic
  • New Topic