What is a Java Exception and what are the five keywords used in Java Exception handling?

Answer 1

Exception is exception and definition is same in all languages -

An exception is an abnormal condition that arises in a code sequence at run time.In other words,an exception is an event,which occurs during the execution of a program, that disrupts the normal flow of the program.When an exception is thrown,an object of a particular exception subtype is instantiated and handed to the exceptional handler as an argument to the catch clause.An actual catch clause as shown below-

try { 
// some code here
}
catch (ArrayIndexOutOfBoundException e) {
 e.printStackTrace();
}

In this example,e is an instance of the ArrayIndexOutOfBoundExceptionclass.As with any other object,we can call its methods.

In Jave we have these five keywords which are used in Exception handling:

1. try
2. catch
3. finally
4. throw
5. throws