What is the difference between Checked and Unchecked
exception? Give some examples
Answers were Sorted based on User's Feedback
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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