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Java has two kinds of exceptions:
1. Checked exception: handled from java.lang.Exception but not java.lang.RuntimeException.
2. Unchecked exception: handled from java.lang.RuntimeException thrown by JVM.
EJB has two kinds of exceptions:
1. System Exception : is an unchecked exception produced from java.lang.RuntimeException. An EJBException is an unchecked exception, which is started from java.lang.RuntimeException.
2. Application Exception : is generic to an application and thrown because of violation of business rules. An Application Exception is a checked exception that is either described by the bean developer and does not import java.rmi.RemoteException.
A System Exception is given by the system and is not recoverable. Because the System Exceptions are unpredictable when they occur, the EJB container is the only one responsible for trapping the System Exceptions. The container usually wraps any RuntimeException in RemoteException, which subsequently puts thrown to the caller. In addition to intercepting System Exception the container can give the errors.
Implement a program to query and update the text database for a library using a client/server model allowing multiple clients safe access to the database, and using a producer-cons
How to Wrapping Your Own Packages in java? Java does not limit you to using just the system supplied packages. You can write your own as well. You write packages just such as
What is difference among LookupDispatchAction and DispatchAction? Ans) The difference among LookupDispatchAction and DispatchAction is that the actual method that gets known in
The "http protocol" is a stateless response or request based protocol. You may contain the state information between different page requests as given below: HTTP Sessions are
Write a program to explain do while loop in Java ? // This is the Hello program in Java class Hello { public static void main (String args[]) { int i = -1; do { if (
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WHY WE USE JAVA PROGRAMMING LANGUAGE EXPLAIN IT
what is the use of marker interface?
What is Alternate Text ? The APPLET element can have an ALT attribute. An ALT attribute is used through a browser which understands the APPLET tag but for some purpose cannot
a program that groups items according to their number
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