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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.
how android applications are made using java.?
Describe about User Security Issues and Social Engineering ? Contrary to popular belief most computer break-ins through external hackers don't happen since of great knowledge
1. final - it is a constant declaration. 2. finally - handles exception. The finally block is optional and gives a mechanism to clean up regardless of what occurs within
Define Array ? Indexed collections of variable of similar data types or we can say a Set of organized variables of similar type.
Authentication is basically an identification step. Functionality used for J2EE security: Principal : An entity that may be authenticated and identified. Principal n
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How Polylines draws in java language? Java automatically closes the polygons it draws. That is it draws polygons which look like the one on the right rather than the one on the
Explain what is Local Variable ? Declaring variables (using the var keyword) inside a function forms them local. They are available only inside the function and hold no meaning
try { pa="weblog"; pas="weblog"; Connection c; Statement st;
In this assignment you work on a set of tasks with the classes Currency, Money and Bank. Money and Currency You have been given a template for the Currency and Money classes (Lab1.
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