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What is the difference between Checked and Unchecked
exception? Give some examples
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Answer / narendra
checked Exceptions must be dealt with in either a try/catch
block or by
declaring a "throws" in a method. Unchecked exceptions
normally are
Runtime exceptions like NullPointerException or
ClassCastException.
A simple rule of thumb: If it's an exception you can
possibly deal with
(continue to run the program using some alternative code),
use checked
exceptions. For exceptions that should never happen (if they
do, it's a
bug), use unchecked (Runtime) exceptions which will come up
to the
surface and displayed to the user. Like this you assure that
if there's
a bug, it will show up eventually and can be fixed, and you
don't run
the risk of catching an exception and forgetting to deal
with it (f.i.
empty catch block).
| Is This Answer Correct ? | 4 Yes | 1 No |
Answer / padmaja
1. Checked exceptions are exceptions that must be
declared in the throws clause of a method. A checked
exception indicates an expected problem that can occur
during normal system operation. Checked exceptions must be
2. Unchecked exceptions are exceptions that do not
need to be declared in a throws clause. An unchecked
exception indicates an unexpected problem that is probably
due to a bug in the code. The most common example is a
NullPointerException.They don't have to be caught or
declared thrown.
3. Checked exceptions in Java extend the
java.lang.Exception class. Unchecked exceptions extend the
java.lang.RuntimeException.
| Is This Answer Correct ? | 2 Yes | 4 No |
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