Hi,

Here is the answer.

Whenever in a program the first exception causes an another exception, that is termed as Chained Exception. Java provides new functionality for chaining exceptions. Exception chaining (also known as "nesting exception") is a technique for handling the exception, which occur one after another i.e. most of the time is given by an application to response to an exception by throwing another exception. Typically the second exception is caused by the first exception. Therefore chained exceptions help the programmer to know when one exception causes another.

For more go to the link-

http://www.roseindia.net/java/exceptions/what-are-chained-exceptions.shtml

Thanks.