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what are checked and unchecked exceptions ?

teja dharma
Ranch Hand

Joined: Feb 07, 2009
Posts: 51
can any body tell me what are checked and unchecked exceptions with one simple example.


SCJP 5
Ruben Soto
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Joined: Dec 16, 2008
Posts: 1032
If you have any code that might throw a checked exception, you must either enclose it in a try/catch clause that handles that potential exception, or must declare the checked exception in a throws clause in the containing method. Basically, the compiler will check that you do that with code that potentially throws checked exceptions. The compiler doesn't care about unchecked exceptions.


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Harshit Rastogi
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Joined: Apr 15, 2008
Posts: 131
teja hyd wrote: can any body tell me what are checked and unchecked exceptions with one simple example.


check this link :Exceptions


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dhanabal vellingiri
Greenhorn

Joined: Apr 02, 2007
Posts: 1
Checked -> Exceptions caught by compiler
unchecked -> Exceptions not caught by compiler( you can write your own catch block to catch at runtime )
Jesper de Jong
Java Cowboy
Saloon Keeper

Joined: Aug 16, 2005
Posts: 14338
    
  22

Exceptions are never caught by the compiler, because exceptions happen at runtime, not at compile time.

Checked exceptions are exceptions that are checked by the compiler - in other words, the compiler checks to see if you handle them with a try ... catch block, or declare that you throw them further with a throws-clause in the method declaration. If you don't handle or declare a checked exception in a throws-clause, the compiler will stop with an error.

Unchecked exceptions are not checked by the compiler - you do not need to catch them or declare them with a throws-clause.


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