Assertion#
Check non null#
It is recommended to use Objects.requireNonNull
(with Objects
being the one of Java 8):
Objects.requireNonNull(executionResult, "executionResult must not be null");
More advanced conditions#
As for more advanced conditions, it is recommended to use Guava’s Preconditions
.
In Wicket code#
In Wicket code, you can use Args.notNull
, Args.notEmpty
, Args.isTrue
, Args.isFalse
. Be careful to use the Args
class from Wicket.