What is exceptions?

1. Exceptions
Pakorn Weecharungsan

2. Contents
 What are Exceptions?
 The try Statement
 The Exception Classes
 The catch Cause
 The finally Block
 Throwing Exceptions

3. What are Exceptions?
 An exception is a runtime error in a
program. Examples are when a program
tries to divide a number by 0.

4. The try Statement

5. The Exception Classes

6. The catch Clause
 The catch clause handles exceptions.
There are three forms, allowing different le
vels of processing

7. The catch Clause

8. The finally Block
 If a program’s flow of control enters a try
statement that has a finally block, the finally bloc
k is always executed
 If no exception occurs inside the try block, then at the
end of the try block, control skips over any catch claus
es and goes to the finally block
 If an exception occurs inside the try block, then any
appropriate catch clauses in the catch clauses section
are executed, followed by execution of the finally bloc
k

9. The finally Block

10. Throwing Exceptions
 You can make your code explicitly raise
an exception by using the throw statement
. The syntax for the throw statement is the
following

11. Throwing Exceptions