• 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

Does string immutability not come at cost of taking more memory?

 
Ranch Hand
Posts: 2925
13
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Strings are immutable but does it not add to it taking more memory.(Despite the concept of string pooling).
 
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
How did you come to that conclusion?
 
Monica Shiralkar
Ranch Hand
Posts: 2925
13
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Since strings are unchangeable everytime new String has to be created(Unless it is in the pool).Thus despite the pooling concept one ends up creating new objects each time and thus taking memory.

thanks
 
Bear Bibeault
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
Ignoring the string pool, any unused string are garbage collected.
 
Java Cowboy
Posts: 16084
88
Android Scala IntelliJ IDE Spring Java
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
There are certain things you should not do with strings, because they are immutable. For example, repeatedly adding to a string in a loop is bad:

When you do this, in each iteration of the loop, a new String object is created into which the content of the previous String object is copied, with the extra "yip" appended.

Instead of doing this, you should use StringBuilder, which is essentially a mutable String object:

So, there are certainly situations where you have to be aware what happens with your strings, and you'd better use a StringBuilder instead.
 
Monica Shiralkar
Ranch Hand
Posts: 2925
13
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
thanks
 
All of the world's problems can be solved in a garden - Geoff Lawton. Tiny ad:
a bit of art, as a gift, the permaculture playing cards
https://gardener-gift.com
reply
    Bookmark Topic Watch Topic
  • New Topic