Java is a general-purpose, object-oriented programming language. We can develop two types of Java programs :

Exceptions:- Exception is a condition Which is Responsible for Occurrence of Error Like Divide by Zero is an condition that never be possible So we can call it an Exception which halts or stops the Execution of Program In java there is an Exception Class Which is Responsible for producing an Error Message when an Error has occurred. 

We Know that java provides us the facility for both creating CUI and GUI Programs All the Previous Topics are Related with the CUI But Applets Provides the ability to user for creating Graphical Programs Like Creating Buttons, Creating Events such that Executing the Code when a user Clicks on Button Etc. There are two type of Applets Like Stand Alone or either Local Applets .