• 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

About Hash Map

 
Ranch Hand
Posts: 142
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi....
Is it preferable to store large amount of data in Hash map?and what's disadvantage of hash map?
 
Bartender
Posts: 11497
19
Android Google Web Toolkit Mac Eclipse IDE Ubuntu Java
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
"Large amounts" is a relative term. How do you define it?
 
Marshal
Posts: 79177
377
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Have a look at this Java™ Tutorials section.
 
Ranch Hand
Posts: 488
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
A HashMap is only as good as it's hashing algorithm. For instance a HashMap that throws everything into 1 bucket is equally as useless as a HashMap which throws everything into it's own bucket. The short answer to your question would be "yes", a HashMap or any of the HashXXX objects are designed to divide and conquer large sets of data. If you need other features such as index then a different collection would be needed.

Hope that helps somewhat... if not, please give more details.
 
Wanna see my flashlight? How about this tiny ad?
a bit of art, as a gift, the permaculture playing cards
https://gardener-gift.com
reply
    Bookmark Topic Watch Topic
  • New Topic