Exceptions are handled seamlessly between Java and Prolog. This means
that exceptions can be thrown in Prolog and caught in Java and the other
way around. For example, if a predicate called from Java throws an
exception with throw/1 and the predicate itself does not
catch the exception, then the Java-method that performed the query,
queryCutFail() for example, will throw an exception (of class
SPException) containing the exception term. Symmetrically,
a Java-exception thrown (and not caught) in a method called from Prolog
will cause the corresponding predicate (simple/2 in the
example above) to throw an exception consisting of the exception object
(in the internal Prolog representation of a Java object). See Handling Java Exceptions for examples of catching Java exceptions in Prolog.