Essential Classes

This trail discusses classes from the java platform that are essential to most programming.

1. Exceptions

explains the exception mechanism and how  it is used to handle errors and other exceptional conditions. This lesson describe what an exception is, how to throw and catch exceptions, what to do with an exception once it has been caught, and how to use the exception class hierarchy.

 

2. Basic I/O

covers the java platform class used for basic input output. It focuses primarily on I/O Stream, a powerful concept that greatly simplifier I/O operation. The lesson also looks at Serialization, Which lets a program write whole objects out of streams and read them back Finally, It touch briefly on the advanced feature of the new I/O API.