• 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
  • Paul Clapham
  • Ron McLeod
  • Jeanne Boyarsky
  • Tim Cooke
Sheriffs:
  • Liutauras Vilda
  • paul wheaton
  • Henry Wong
Saloon Keepers:
  • Tim Moores
  • Tim Holloway
  • Stephan van Hulst
  • Carey Brown
  • Frits Walraven
Bartenders:
  • Piet Souris
  • Himai Minh

Where is the method body is implemented?

 
Greenhorn
Posts: 11
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Inside a servlet ,we call the method getParameter( ) to get the parameter value . This method belongs to 'ServletRequest' which is an INTERFACE . So my question is , since the methods of 'interface' have only declaration , where is the body defined?
Where is the method getParameter() is implemented ???

Please help me in this regard.
 
Ranch Hand
Posts: 129
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
When a request is send to a servlet (either doGet or doPost) an instance of Type HttpServletRequest will be send as argument. Interface HttpServletRequest would be implemented by the container.
 
Sheriff
Posts: 67637
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
Indeed. The whole point of interfaces is that you, as a consumer of those interfaces, don't need to worry about the implementation of them.

A concrete class that implements the interface is created by the servlet container (Tomcat, etc) and passed to your servlet.
 
If you two don't stop this rough-housing somebody is going to end up crying. Sit down and read this tiny ad:
Free, earth friendly heat - from the CodeRanch trailboss
https://www.kickstarter.com/projects/paulwheaton/free-heat
reply
    Bookmark Topic Watch Topic
  • New Topic