Assertions.

[venkatesh rajmendram]

Hi,
What is the difference between
java -ea and
java -dsa
First one says enable assertions at runtime for all classes except for the system calsses
second one says enable assertions in general, but disable in system classes.
Any clarifications....
Also what type of question can be asked in exam ..any tips...?
Thanks
Venkatesh

[sanjana narayanan]

Originally posted by venkatesh rajmendram:
Hi,
What is the difference between
java -ea and
java -dsa
First one says enable assertions at runtime for all classes except for the system calsses
second one says enable assertions in general, but disable in system classes.
Any clarifications....
Also what type of question can be asked in exam ..any tips...?
Thanks
Venkatesh

java -ea
enable assertions at runtime for all classes except for the system calsses . This is true
java -dsa
We are disabling the assertions for the system classes. By default
the assertions are disabled for all classes at runtime. So we have to explicity give -ea to enable the assertions.
Hope it is clear.
-Sanjana

[venkatesh rajmendram]

Oh!! I misstyped it , it is supposed to be
java -ea -dsa
and
java -ea
they both mean the same...I guess ...any clarification is appreciable
Thanks
Venkatesh

[Marlene Miller]

Hi Venkatesh,
�ea �dsa and �ea mean the same thing.
Here are some insights into the assertion switches:
1. To make it easy to turn on asserts in all classes except for system classes, -ea does not apply to system classes.
2. Since �ea does not apply to system classes, a separate switch is provided to enable asserts in all system classes. �esa
3. �For symmetry, a corresponding switch is provided to disable asserts in all system classes, though it is not clear that there exists a use for this switch.� -dsa
http://java.sun.com/docs/books/jls/assert-spec.html Appendix II
[ December 23, 2003: Message edited by: Marlene Miller ]