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Servlet Request Object
What is difference b/w WITH ServletRequest Object:................RequestDispatcher rd = getServletContext().getRequestDispatcher( "/servlet/XYZServlet"); rd.forward(request, response);with ServletContext Object:.......... RequestDispatcher rd = getServletContext().getRequestDispatcher( "/servlet/XYZServlet"); rd.forward(request, response);what is difference b/w these two objects?which one is better...
ajaykjha
- Oct 31st, 2006
In case of ServletRequest, we provide the path relative to http request while in the case of ServletContext we provide path relative to root of context.
Spoorthi
- Sep 17th, 2006
If we use ServletRequest object then we have to give only the servlet name. For ServletContext object we have to give the relative path i.e, in a context we have more than servlet instances. so we have to give the path from context level.
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What is connection pooling?how to implement connection pooling?
ajaykjha
- Oct 24th, 2006
Creating a Connection object is one of the most expensive operations in database programming so we use connection pooling.When the application starts, a certain number of Connection objects are create...
srinivas.g
- Jul 25th, 2006
connectionpool is a setof readily availble connection objects.this concept is very useful .because creating data base connection and destroying connection is quite unusual process ,it degrades th...
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Difference between forward and sendRedirect
What is difference between forward and sendRedirect
srinivasaraobora
- Oct 13th, 2006
Hi,The forward action allows the request to be forwarded to another resource (servlet/jsp/HTMl> which are available in the same web-application (context).Where as in the case of Response.sendRedire...
Rukmangada K J
- Oct 13th, 2006
In sendRedirect we can forward the request to the file in another context path but in case of forward() method it only invokes the file within the context path....
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How to develop ejb applications in Eclipse 3.0
srinivasaraobora
- Oct 13th, 2006
Hi,This is srinivasarao from geektalk. i will explain but it is better to see the diagrametically. so see the below URL's to EJB module with the My eclipse IDE.http://www.myeclipseide.com/images/...
Preeti Yadav
- Sep 13th, 2006
Try this URL: http://www.myeclipseide.com/ContentExpress-display-ceid-30.html
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I take simple stateless sessionbean example.when execute this client program,javax.naming.namenot found exception occured.where can i collect jndi name?iam not using anytransaction,data source,isolation in my program.
hmashruf
- Oct 5th, 2006
Hi,The JNDI name is to be correct. The format to call with that JNDI name should also be correct.
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Connection c=DriverManager.getConnection("jdbc:oracle:thin:@hostname:1521:sid","scott","tiger" );
Statement s=c.createStatement();
ResultSet rs=s.executeQuery("select * from books");
while(rs.next())
{System.out.println("dno="+rs.getString(1)+"t"+"dname="+rs.getString(2)+"t"+"loc="+rs.getString(3));
}
}catch(Exception e){System.out.println(e);}
}
}">Problem in connection with Oracle without ODBC using Think DriverFollowing code is not workinggiving error Exception in thread Main java.lang.NoClassDefFoundError:jdbc1import java.sql.*;class jdbc1 { public static void main(String args[]) { try{ Class.forName("oracle.jdbc.driver.OracleDriver"); Connection c=DriverManager.getConnection("jdbc:oracle:thin:@hostname:1521:sid","scott","tiger" ); Statement s=c.createStatement(); ResultSet rs=s.executeQuery("select * from books"); while(rs.next()) {System.out.println("dno="+rs.getString(1)+"t"+"dname="+rs.getString(2)+"t"+"loc="+rs.getString(3)); } }catch(Exception e){System.out.println(e);} } }
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What is the difference between Java RMI and RMI IIOP?
nithyananthan
- Sep 4th, 2006
This is a good web site. thank you very much.
Preeti Yadav
- Aug 31st, 2006
Java RMI technology runs over RMI-IIOP delivers Common Object Request Broker Architecture (CORBA) distributed computing capabilities to the Java 2 platform.RMI over IIOP provides the ability to write ...
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Can anybody help me by sending the General Programs which are asked (in which they give the program and ask us the output) as a part of written test before Oral Interviews for CORE, ADV and J2EE. The Theoritical Questions which we find are generally see in the search sites are really helpful during the Oral Interview, But I would like to know the Programs on this too.please help.I am sure this will be a great help for other attending interiews too.Thanks a lot in advance,Sarma.
Ramesh
- Aug 19th, 2006
Very nice
pcpat
- Jul 24th, 2006
Well u can find programms on core java will be normally on topic like strigs,collection & threads which u can find in any book.Any way if u still find it difficult to get it i'll fwd link where u can get them.
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What is the need to throw your own user defined exception using throw
asanthine
- Aug 17th, 2006
Creating and throwing ur own exception helps in optimising the performance of the class u create. for example if u create an application for "Creating Marklist" u might create a exception that gets throwed when "wrong student id is entered ".
jaimaruthi
- Aug 7th, 2006
creating and throwing ur own exception helps in optimising the performance of the class u create. for example if u create an application for "Creating Marklist" u might create a exception that gets throwed when "wrong student id is entered ".
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Wat is local variable and instance variable?
pankaj
- Aug 16th, 2006
There are three kinds of Java variables:Local variables are declared in a method, constructor, or block. When a method is entered, an area is pushed onto the call stack. This area contains slots for e...
santi
- Aug 1st, 2006
local variable is a variable declared inside a method whereas instance variable is declared at classlevel. if wrong plz advice
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What is magic word in java? and How to find it?
ca fe ba besteps:when u open any .class file.u can see first 4 characters.u have read those characters from the class file and convert those characters into Hexadecimal using toHexString method in Integer wrapper class.
pankaj
- Aug 16th, 2006
A reserved word, sometimes called a magic word is a word which, in some computer programming language cannot be used as an identifier because it is already used for some grammatical purpose. For...
nrkonjeti
- Jul 6th, 2006
Sometimes the specification for a programming language will have reserved words that are intended for possible use in future versions. In Java, const and goto are reserved words ? they have no meaning...
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