Doubt in Exceptions

[Lavanya Raguram]

I was going thro Exception Handling in K&B book, where they have mentioned that checked exceptions should be either declared or handled but it is not necessary for runtime or error type of exceptions.

But i am not able to classify which r checked n which r unchecked exceptions can anyone pls post the exceptions with their classifications as checked n unchecked or is their any other means to find out if the exception is chekced or not.I am completely confused regding this.

[Keith Lynn]

RuntimeException, Error, and their subclasses are unchecked. All other exceptions are checked.

[Lavanya Raguram]

i know that runtime,error are unchecked but i dono the names of the exceptions that r checked n unchecked how can i find which exceptions r runtime exceptions or exceptions of type error or they r checked exceptions.

is there any book that specifically lists out the cchecked n unchecked exceptions?

[Keith Lynn]

I don't know if there is an exhaustive list. However, you can you use the API docs and find them.

[Naresh Gunda]

RuntimeException, Error, and their subclasses are unchecked. All other exceptions are checked.

check Java API

For every class, its super class is given in the API

Suppose for ArithmeticException,

    
Class ArithmeticException
java.lang.Object
  java.lang.Throwable
      java.lang.Exception
          java.lang.RuntimeException
              java.lang.ArithmeticException
 

Here ArithmeticException is the subclass of RuntimeException so it is unchecked exception.
[ April 05, 2006: Message edited by: Naresh Kumar ]