exception handling in java

1. Topic-Exception
Handling
Submitted to :Aman kumar
Submitted by :Ravinder kaur
Msc.it/3rd
1725794

2. EXCEPTION
 Exception is a problem that aries during
the execution of a program.when
exception occurs the normal flow of the
program is disturb and the program
terminates abnormally.

3. REASONS FOR EXCEPTIONS:-
 An exception can occur for many different
reasons. Following are some scenarios
where an exception occurs:-
 A user has entered an invalid data.
 A file that needs to be opened cannot be
found.
 A network connection has been lost in the
middle of communications or the JVM has
run out of memory.

4. ERROR
 An Error is any unexpected result
obtained from a program during
execution.
 Errors should be handled by the
programmer, to prevent them from
reaching the user.
 Unhandled errors may manifest
themselves as incorrect results or
behavior, or as abnormal program
termination.

5. TYPES OF Error
RUN TIME Error- Dividing and integer by
zero ,
 Acessing an elemet which is out of
bound,try to store a value which is
incompatilbe with class or variable type,
 passing parameter that are not in valid
range.
COMPILE TIME Error -missing
semicolomn,
 missing brackets in class or method,
 missing double quotes in string,
 use of undefined operator.

6. EXCEPTION HANDLING
Exception Handling is a mechanism to
handle runtime errors .with thw help of
exception handling we can easily find an
error and easily remove or solved error
that occur during the execution of a
program.

7. Steps for handling exception
 Find the problem .
 Infrom that error has occurred.
 Receive the error information
 Tak ecorretive action.
Hit the exception
Throw the exception
Catch the exception
Handle the exception

9. COMMON JAVAEXCEPTION
 Arithmetic exception.
 Array store exception.
 I/O exception.
 Null pointer Exception.
 Security exception.
 String out of bound exception.
 Number format exception.
 File not find exception.

10. Types of JAVA EXCEPTION
 Checked Exception.
 Unchecked exception.
 Error.

11. Types of JAVA EXCEPTION
 Checked Exception-The classes which
directly inherit Throwable class except
RuntimeException and Error are known as
checked exceptions e.g. IOException,
SQLException etc. Checked exceptions are
checked at compile-time.
 Unchecked Exception-The classes which
inherit RuntimeException are known as
unchecked exceptions e.g.
ArithmeticException, NullPointerException,
ArrayIndexOutOfBoundsException etc.
Unchecked exceptions are not checked at
compile-time, but they are checked at
runtime.

12. Example of exception handling in
java
public class JavaExceptionExample{
public static void main(String args[]){
try{
int data=100/0;
}
catch(ArithmeticExceptione)
{System.out.println(e);}
System.out.println("rest of the code...");
}
}