Exceptions are nothing but some anomalous conditions that occur during the execution of the program. Exceptions are the conditions or typically an event which may interrupt the normal flow of the program's instructions.
Exceptions in Java
Exceptions are nothing but some anomalous conditions that occur during
the execution of the program. Exceptions are the conditions or
typically an event which may interrupt the normal flow of the
Classes The hierarchy of exception classes commence from Throwable class
which is the base class in java.lang. This class can be instantiated
and thrown by the program. The Throwable class is further divided into two
and Handling Exceptions The three exception handler components are used to catch and handle
the exceptions. These are try, catch and finally clause. The mechanism to
catch an exception in Java is to use try and catch block.
Throw Exceptions Before catching an exception it is must to be thrown first. This means
that there should be a code somewhere in the program that could catch the
Handling Multiple Catch
In java when we handle
the exceptions then we can have multiple catch blocks for a particular try
block to handle many different kind of exceptions that may be generated
while running the program.
Nested Try-Catch Blocks In Java we can have nested try
and catch blocks. It means that, a try statement can be inside the
block of another try.
The exceptions that are generated by methods are referred to as normal
exceptions. We have already learned that to catch an exception we
use try and catch block.
Making Custom (User
If you encounter a situation where none of those exception
describe your exception accurately or if you can't find the appropriate
exception in the Java API, you can code a class that defines an exception
that is more appropriate
are Chained Exceptions
Chained exceptions are the exceptions which occur one after another i.e.
most of the time to response to an exception is given by an application by
throwing another exception.
How to Print a Stack Trace Message Instead of this this method you can get more
information about the error process if you print a stack trace from the
exception using the printStackTrace() method that prints the stack trace to the