JSP Implicit Objects

JSP Implicit objects are created by the web container. These implicit objects are Java objects that implement interfaces in the Servlet and JSP API. Scripting elements in a JSP page can make use of these JSP implicit objects. There are nine (9) JSP implicit objects available.

JSP Implicit Objects are as follows:

  1. request implicit object

    The JSP implicit request object is an instance of a java class that implements the javax.servlet.http.HttpServletRequest interface. It represents the request made by the client. The request implicit object is generally used to get request parameters, request attributes, header information and query string values.

  2. response implicit object

    The JSP implicit response object is an instance of a java class that implements the javax.servlet.http.HttpServletResponse interface. It represents the response to be given to the client. The response implicit object is generally used to set the response content type, add cookie and redirect the response.

  3. out implicit object

    The JSP implicit out object is an instance of the javax.servlet.jsp.JspWriter class. It represents the output content to be sent to the client. The out implicit object is used to write the output content.

  4. session implicit object

    The JSP implicit session object is an instance of a java class that implements the javax.servlet.http.HttpSession interface. It represents a client specific conversation. The session implicit object is used to store session state for a single user.

  5. application implicit object

    The JSP implicit application object is an instance of a java class that implements the javax.servlet.ServletContext interface. It gives facility for a JSP page to obtain and set information about the web application in which it is running.

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  6. exception implicit object

    The JSP implicit exception object is an instance of the java.lang.Throwable class. It is available in JSP error pages only. It represents the occured exception that caused the control to pass to the JSP error page.

  7. config implicit object

    The JSP implicit config object is an instance of the java class that implements javax.servlet.ServletConfig interface. It gives facility for a JSP page to obtain the initialization parameters available.

  8. page implicit object

    The JSP implicit page object is an instance of the java.lang.Object class. It represents the current JSP page. That is, it serves as a reference to the java servlet object that implements the JSP page on which it is accessed. It is not advisable to use this page implict object often as it consumes large memory.

  9. pageContext implicit object

    The JSP implicit pageContext object is an instance of the javax.servlet.jsp.PageContext abstract class. It provides useful context information. That is it provides methods to get and set attributes in different scopes and for transfering requests to other resources. Also it contains the reference to to implicit objects.

This JSP tutorial was added on 11/05/2008.

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Comments on “JSP Implicit Objects”

  1. Sathya

    Thank you sir..

    ur ans really hepls us..:))

  2. mohan

    thank you very much its very simple and understandable format so its very useful for every one

  3. Anonymous

    It’s is easy to understand and very helpful.
    Thanks a lot.

  4. sonu chaudhary

    thankyu sir because due to this my problem was solve in easy way,it is easy to understand and very helpfull for us…….

  5. Dhanunjay Tanakanti

    Very nice… to help us

  6. nice sir thank u very much

  7. ashok

    thank u sir

  8. Kirana

    very ez to understand…

  9. Rahul

    Thankyou sir,

  10. praveen rohal

    hi, can you please explain the internal working of “request” object.
    i have doubt regarding “request” whether it is httpServletRequest Interface reference var
    or
    it is class reference variable that implemented “httpServletRequest interface”

    ================let take an example=======
    i wanna to take username(textfield) in first.jsp and show it in second.jsp.

    now please let me know how it will work… how the code will compiled internally …

    please let me know i have searched a loot.. but not clear…

  11. venkat

    can u please any provide the detailed explanation about the pageContext

    Thanx in advance

  12. tt

    trc tyreuyi yutut

  13. Asha

    Can you please provide detailed description about config implicit object

  14. HELLO ..

    If u don’t mind this is very Critical to read the letters on the Brown background

    Please change the background of the page The letters on the Panel are not visible

  15. Amit Kumar

    You wrote
    “The JSP implicit pageContext object is an instance of the javax.servlet.jsp.PageContext abstract class.”

    Kindly let me know how can an instance be created of abstract class?

    • Arvind Kumar Gangwar

      No, Abstract class never be instantaneous..we can’t create Abstract class instance.But every class have default constructor, so the class which extend Abstract class will be instantaneous.

  16. madhavan

    Nice to read and understand

  17. lukky

    its interprets in easy understandable format for every one, thanque

  18. praveen

    thnk u sir for u clear cut defination ..

    this defination set an image in my mind

  19. can u explain about page context in detail ?????

  20. Anonymous

    Thanks u sir …but i have a doubt …can i create my own implicit objects in jsp….if it is possible how to create my implicit objects

  21. well, in two interviews they asked this Q.To be honest i didn’t know the answer,your blog is simple & understandable.

  22. Sharad Jain

    Which implicit object is not available to JSP?
    a)Page
    b)Page context
    c)Session
    d)Exception

  23. bhanu

    Thank you Sir
    Its very easy to learn and understandable

  24. Anonymous

    thanku sir….
    it is very easy to understand

  25. Anonymous

    thanku sir….
    it is very easy to understand

  26. Anonymous

    thnx sir it is easy to understand.But if there were some example of these concept so it make more easy to understand for learner..

  27. Anonymous

    thanks.By using these implicit objects we want one example

  28. Padma

    Thank you Sir.
    we want some more depth concepts in jsp.

  29. PRASHANT

    Thanks.
    add some more depth concepts in jsp.

  30. Ram

    Good Content.

  31. Surya

    It’s very useful to everyone(bingners/experience).Thank a lot to give clarity information…!!!!

  32. jyoti jajpuria

    thanks …its really helpfull.

  33. khuhbu ajmera

    Thank you sir…it is easy to understand

  34. Aswini

    thaks for ur information sir…but i have a doubt in the line
    “The JSP implicit pageContext object is an instance of the javax.servlet.jsp.PageContext abstract class”
    how can one create an instance of an abstract class..

  35. Vishnuvardhan

    Thanks Joe,

    You gave clear idea about all objects .It is very helpful to us.

  36. Balaji

    I have never been able to Understand diff. between page and pageContext, and even config to some extent.For Example request.setAttribute(‘a’,a) can be get in as
    request.getAttribute(‘a’) in Next Page (After Request Dispatcher).

    I have been asked this in Many Interview Questions also…and none of my freinds also dont understand it clearly, everyone says this or that…like that,something like that etc………

    But None of the (Heck Break the barrier) can tell it clearly, pls explain it to me Clearly…pls explain me the difference with a small Real Time Example Sir.

  37. Anu

    Hi could anyone let me know if dere is any method to dynamically read the context path form the url?(preferring not to use httpservlet)

  38. Anonymous

    Hi Joe,
    it’s fine to see such work…heartly salute to your hard work…But it would be much better if you have given us some examples also…

  39. Hi Joe,
    it’s fine to see such work…heartly salute to your hard work…But it would be much better if you have given us some examples also…

  40. Anonymous

    Very Helpfull

  41. Robin Bhargava

    Thanks a lot. For sharing this knowledge.

  42. arjun panday

    thank you sir..

  43. Ghufran Ahmad

    great effort sir..huge output in minimum time…thanks a lot

  44. ramesh

    thank you sir

  45. kishore

    nice answer

  46. K Padmanaban

    Hi sir,

    Your answer is very elaborative and true to the point.

    Thanks a lot

  47. Dinesh

    I used to refer your site for many of my doubts. Such a clear Explanation. Hats-off to you buddy

  48. manali

    nice explanation….

  49. jita

    Thanks joe for nice collection.

  50. Ahte

    nicely explianed…… joe

  51. Ramanujulu

    thank you sir
    nice explanation

  52. shiva

    Hi Joe
    From the above topic i understood that implicit objects are mainly useful when we are writing the business logic. But wehave servlets already to do this task then why we need implicit objects in JSP.

  53. vijay

    thanks….

  54. Surya

    Easy and understandable. Great. Thanks

  55. krish

    Hi,
    Can you please explaine me how we can access to our application…

    500
    /error-pages/servererror.jsp

  56. preeti

    i read your most of the articles ,it very nice

  57. Anonymous

    Very helpful tutorials…
    Makes the concepts so easy to understand

  58. Vikrant

    Awesome tutorials.There is nothing better than you on java on the web, esp. in explaining things as a teacher does.

  59. Ajay

    Very Nice explainations….Thanks sir..it helped a lot.

  60. Raj

    hi joe,could u tell me ,how to create a hit counter to website,

  61. RAJA RAO

    Shortcut to remember JSP implicit objects are
    SCOPE A RPR
    expand yourself each letter

  62. Anonymous

    very nice and simple question…….so thanks

  63. Anonymous

    Hi Joe, I am in my corporate training and from the day one, your blog has helped me a lot.thanks a ton !!

  64. Anonymous

    Short and Sweet information…
    thanks Joe…

  65. pranathi

    ur blog is very slow in your blog java material is more less comments is very may i think u prefare comments only

  66. srividya Reddy

    Itz very easy to uderstand……….

    ThanQ…..

  67. karthik

    Hi Joe,
    very good tutorial.
    can u plz. tell the difference between those implicit objects……

  68. Anonymous

    very interesting format sir. . . .

  69. Maruthi Reddy

    very interesting format sir. . .

  70. Anonymous

    Thank U.. Can u plz provide the Examples for the same

  71. Anonymous

    thank u for ur guidance

  72. Anonymous

    i like ur posts Master

  73. PSG

    The JSP implicit pageContext object is an instance of the javax.servlet.jsp.PageContext abstract class.

    I think “instance of” should be changed with “implementation of” because you can’t have an instance of a abstract class!.

  74. chaitanya

    sir, it was really easy to understand.. thanks alot sir…

  75. Megha

    Really Helpful for interview questions !!
    Keep Posting sir, Great Job !!

  76. Anonymous

    thnk uuuuuuuuu

  77. ramu

    how many implicit objects are there in every java class?

  78. San_Krish

    UseFul stuff

  79. Areeg

    How can I call jsp page from java class without using HttpServlet?

  80. avinash

    ur explanation is good ..but if some example is avilable it will be better …..

  81. Lokesh Chandramohan

    Awesome,Excellent.You are from Virtusa.

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