Exception handling in Java
Effective exception handling makes a program more vigorous than before and for the better working of programs, exception handling is a must to avoid unnecessary errors. Java is the best and the most object aimed programming language offers the procedure of exception handling.
What is exception handling?

The exception is a predicament that occurs while the program is being executed. This type of problem occurs because of various reasons like the invalid data are entered or the file that needs to open is not being found or the network connection has been lost in the middle communication.
This leads to system failure and that is the reason Java introduced exception handling to avoid irrelevant errors. The exception handling maintains the runtime errors so that the flow of execution will not be interrupted.
Some of the exception handling mechanisms are SQL, IO, ClassNotFound and etc.
Error VS Exception
• Recovering of errors is impossible whereas on the other hand recovering of exception is possible.
• Error is caused by the environment on which the application is running and the exception is caused by the application.
• Exception handling can happen at both compile and runtime whereas errors only happen at runtime.
• Error is of the only type which is unchecked and there are two types of exception checked and unchecked.

Hierarchy of ‘EXCEPTION’

Both the types of exception and error are sub-division of class throwable which is the base class of a hierarchy.
EXCEPTIONS
Exception class is used for exceptional conditions only and it is sub-categorized into ‘Checked Exceptions’ and ‘Unchecked Exceptions’.
ERRORS
Error is used by Java Runtime System that indicates errors that perform in the runtime environment that is JRE. It is sub-divided into ‘Virtual Machine Error’ and ‘Assertion Error’.
Two types of Exceptions: Checked & Unchecked
CHECKED EXCEPTION
The exceptions that are checked at the compilation time by compilers is called a checked exception. Programmers must know how to handle these exceptions because they are difficult to ignore.
UNCHECKED EXCEPTION
This type of exception is being handled at the runtime environment and that is the reason it is also known as ‘Runtime Exception’. During the time of compilation, runtime exceptions can be ignored.
So, from this article, it is very obvious that exception handling plays a very crucial role in making the systems work properly. SkyWebcom offers comprehensive training of exception handling in Delhi/NCR where training is based on live scenarios. Trainers of SkyWebcom offer advanced training that ranges from basic to advanced level in order to prepare the candidates for difficult situations. Apart from in-depth learning SkyWebcom also gives 100% placement assistance in top companies.