Difference between throws clause and try-catch-finally block

November 19, 2018 SJ Exception Handling 0

Java Exception handling:

There are 5 keywords related to Exception Handling; those are

try
catch
throw
throws
finally

try-catch-finally combination:

We can use 3 combination of try-catch-finally in Java methods; those combination are

try-catch
try-finally
try-catch-finally

throw and throws (with an extra S):

throw is used to throw exception from executing block; it could be try-block or catch-block (from inside a method)
throws is used to indicate that particular method is possibly throws these exceptions; again method can throws any number of exceptions

Difference between throws clause and try-catch block ?

As explained above, throws clause is used to indicate that particular exception is possibly thrown from executing method at run-time
Whereas try-catch block is used to handle exception scenario
Like, if any particular exception is thrown from try block;
then corresponding catch-block catches that particular exception and we can take necessary action from there ON (this is some kind of coding stuff)

try-catch block	throws keyword
Using try-catch block, we can handle exception surrounding code that might raise an exception	Whereas using throws keyword, we can simply declare exception that might raise from that method
Caught exception in the catch block can be re-thrown after some alteration	There is no such flexibility, as its directly throws exception
try-catch block ensures graceful termination for that particular method Except one scenario when catch block throws exception	Doesn’t guarantee graceful termination In most cases, throws declaration leads to abnormal termination

Hope, it help to understand most of the things related to Java Exception Handling

References:

Happy Coding !!
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