Complete guide on Advance computer progamming complete notes

CSE205: Object Oriented
Programming
Lecture # 11: Exception Handling

Muhammad Imran
(Based on Java, The Complete Reference)
http://www.secscourses.tk




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, Outline
• Exception
• Exception Handling Fundamentals
• Exception Types
• Uncaught Exceptions
• Using try and catch
• Multiple catch Clauses
• throw
• throws
• finally
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, Exception
• An exception is an abnormal condition that arises in a code
sequence at runtime
• An exception is a runtime error
• In OO terms, an exception is an object that describes an exceptional
condition that has occurred in a piece of code
• When an exceptional condition arises, an object representing that
exception is created and thrown in the method that caused the
error
 That method may choose to handle the exception itself, or pass it on.
 Either way, at some point the exception is caught and processed.




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, Exception-Handling Fundamentals

• Exceptions can be generated by the Java runtime
system, or they can be manually generated by our
code
 Exceptions thrown by Java relate to fundamental errors
that violate the rules of the Java language or the
constraints of the Java execution environment
 Manually generated exceptions are typically used to
report some error condition to the caller of a method


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