Exception handling

Exception is an event which will terminate program unexpectedly.

Two types of exceptions

Checked Exceptions

Exceptions which are identified by the java compiler.

InterruptedException

IOExceptin

FileNotFoundException

Un-Checked Exceptions

Exceptions which are not identified by the java compiler.

Arithmetic Exception

NullPointerException

NumberFormatException

ArrayIndexOutOfBoundException

Handling Exceptions

Syntax1:

try

{

statements;

}

catch(Exception Type)

{

statements;

}

Syntax2:

try

{

statements;

}

catch(Exception Type1)

{

statements;

}

catch(Exception Type2)

{

statements;

}

catch(Exception Type3)

{

statements;

}

Syntax3:

try

{

statements;

}

catch(Exception Type1)

{

statements;

}

finally

{

statements;

}

finally block is always executes:

1.Exeption doesn't occur

2.Exception occurs and not handled

3.Exception occurs and handled.

Checked Exception can be handled by 2 ways

1.try..catch

2.throws keyword