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what happens if your business exception extends Runtime Exception
The complier thinks that the businness exception is a Runtime exception , It just bypasses without any error message.
krishna_ballabh
- Jul 31st, 2009
Extending the Runtime Exception means you are giving the definition of your exception as System Exception, for each System Exception your container will do a different process, mean what ever transact...
hr1551
- Jul 10th, 2007
It is not recommanded because business exception should be caught in compile time instead of run time.
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What is taglib?
What's taglib?
sreenivasgowd
- Sep 5th, 2009
Taglib is directory, It contains predefined tags. It looks same as package, package contains predefined classes.
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What is difference between == and & operators
sreenivasgowd
- Sep 5th, 2009
1. == operator can be used to check two operands can be equal or not 2. & means address operator it stores the address of a variable Ex: 1. a=20;b=20; if (a==b) System.out.println("both ...
chinna_punna8
- Jan 17th, 2006
"==" is a logical operator and is used to compare two operands."&" is bitwise AND operator .
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When we write JavaScript Code in the JSP Page from where the Java Script code will be executed by the Container
naveen.bj7
- May 9th, 2008
Whenever request for that jsp is sent thru URL of the available browser then the javascript code in the tags will be execute
srinivas.g
- Jul 25th, 2006
Actually we need validation first of all. if we done serverside validation ,it sholudbe checked at serverside.but it will increase the network traffic.so that's why we need java script which is used to validate the given data at clientside before submitting to server.
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What is the difference between & and && operators?
sapanindia
- Aug 13th, 2010
These are Bitwise and Logical Operators in Java1. &= bitwise AND2. &&= logical AND (Shourt-circuit)1. These operators & are used with boolean operands and return a boolean value (true or false). Thes...
pranavkohli
- Aug 11th, 2010
It depends on the type of the arguments... For integer arguments, the single ampersand ("&")is the "bit-wise AND" operator. The double ampersand ("&&") is n...
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What is the difference between javabeans and ejbbeans
srinivasaraobora
- Aug 12th, 2006
Hi Friends,JavaBeans may be visible or nonvisibleat runtime. For example, the visual GUI component may be a button, list box, graphic, or a chart An EJB is a nonvisual, remote objectJava Beans ar...
srinivasaraobora
- Jul 24th, 2006
Hi Friends,JavaBeans may be visible or nonvisibleat runtime. For example, the visual GUI component may be a button, list box, graphic, or a chart An EJB is a nonvisual, remote objectJava Beans ar...
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What is the difference between thin client and thick client?
Sandhya.Kishan
- Jun 19th, 2012
Thin Clients 1.Easy to deploy as they require no extra or specialized software installation 2.The data captured is verified by the server. 3.Clients run only and exactly as specified by the server 4.R...
jyotsna
- Apr 20th, 2006
Thin client is browser based and thick client is window based
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Available methods in synchronization ?
dhayasinfo
- Jul 16th, 2012
Synchronization is a process by using Synchronize keyword to prevent the dead lock. This can be used in methods or block to prevent two threads to access the same resource in the same time.
amreenkhader
- Jan 20th, 2012
In this two threads cannot use the same resource simultaneously beacuse the thread execution gets interrupted or terminated hence only a single thread can share resource at a time.
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Can a servlet page serve more than one client requests?how
suman
- Feb 13th, 2007
HI Santh Kumar, As u said servlets have multiple instances(it is wrong) each servle has one instance only, when a new request comes it does not create an instance but it creates a thread to the request.remaing answer is ok, Thanks
santh kumar
- Jan 31st, 2007
It's True that a servlet can process multiple requests at a time.this can be application specific and the server specific. Concerns to Servers : servers can maintain a numorous instances of a serv...
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What is Persistent Base Class in Hibernate? Give me a example of one-to-many mapping using person and address in Hibernate.
deepakvinayak
- Feb 27th, 2007
HiActually I wanted to know one-to-many mappings between person and address. But u have sent . Now I know the answer, which is as :
deepakvinayak
- Feb 27th, 2007
HiActually I wanted to know one-to-many mappings between person and address. but u have sent many-to-one. Now I know the answer which is as :Persistent base class is the base class for all persistent ...
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1. what is throwable and where should we use this? 2. How can you increase the JVM memory? 3. Abstract class is a partially implemented class so, How can we call an abstract method without creating... 4. How to Stop the creation of objects(For ex:For Player class of Cricket Team,stop instance creation after... 5. Can HashMap store null values?If yes, how many and in which one? 6. What is the Difference between Runtime and RunTime java API's? 7. How we upload and download files in JSP and Servlets ,What methods we are using?? 8. Why return type is not a part of method signature? 9. what is the difference between String and StringBuffer? 10. Can we create a class in a method if it is possible how
ramesh.sure
- Jun 26th, 2008
String is Immutable where as StringBuffer is Mutable.Mutable: The objects whose contents can be modified is called as Mutable.Ex: U can try this.String myString = new String( "old String" ); System.ou...
subhasish_25
- Jan 11th, 2007
Throwable class is the superclass of all errors and exceptions in the Java language.Instances of two subclasses, Error and Exception are conventionally used to indicate that exceptional si...
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Difference between java bean and enterprise bean
What is the difference between java bean and enterprise bean? when will be used java bean and enterprise in real time projects?
rajasekar_muthusamy
- Jan 22nd, 2009
Enterprise Bean:Gives you the facility of security & transcation , state management & reduction of network code. All the above facility will be provided by application server when it is deploy...
Vijay
- Jan 29th, 2007
Java Beans are Non-deployable components, means the state or life of javabean is not controlled by any container.EJB is a deployable component thru application servers...
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How do you redirect in JSP and in Struts?
mabhijit
- Jan 11th, 2008
There are two ways to redirect a request from JSP. They are1). response.sendRedirect("Path");2). requestDispatcher.forward("path");Now the difference b/t these two are :-1).sendRed...
nirajthacker
- Sep 26th, 2007
If you use response.sendRedirect("path") you will lose your request object. Use requestDispatcher.forward("path") to retain your request object.
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What are the Action Classes?
mani.sivapuram
- Feb 10th, 2011
Action classes are like controllers in MVC architectures.Since when we send the request to server then action class is going to do the operation like it take the data from request object and send it to service layer according to required operation.
mabhijit
- Jan 11th, 2008
The action classes are the link between the Struts framework and your business application logic. The fact that the main method in the action class is called "perform" indicates that the act...
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Java Bean
What are the properties of a Java Bean?
Ashish Gupta
- Jan 20th, 2018
Private modifier, getters & setters are public.
Sanjay Makawana
- May 11th, 2015
Index properties
bound properties
simple properties
boolean properties -
Why java Soft has declared HttpServlet Class as an Abstract class?Is there any performance issue?
In HttpServlet class there is no any abstract method although javasoft declared this class as an abstract
class.Ok,this is valid in java.So if we want to utilize this class we will have to extends this class.But we can use to achieve this one by using Httpservlet class as simple java class also.
Ganesh Bhat
- Apr 3rd, 2015
The interface of HttpServlet is complete, but not the implementation/functionality of it. abstract restricts a developer to use the HttpServlet as is, rather it forces the developer to extend it and p...
Sandhya.Kishan
- Jul 4th, 2012
Java soft has declared httpservlet class as an abstract class for its performance, scalability and reusability issues and for security purpose.
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What is Hybernate Sprig?
Its Frame Work for Persistence
sreenivasgowd
- Sep 5th, 2009
- Hibernate is ORM software (object rational mapping), it can be used to develop
persistence logic to interact with database for performing persistence operations.-
Spring is a framework software to develop enterprise based business logic and it deals with complex logic.rakesh
- Jul 17th, 2007
It is a tool used to map the pojo objects with the database objects. It also reduces the burden of coding since we do not specify the java database connectivity. The hybernate creates internal mapping.
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