Such overloads introduce ambiguity and require callers to cast lambdas to a specific type or specify lambda parameter types explicitly. It is preferable to give the overloaded methods different names to eliminate ambiguity.
Example:
interface MyExecutor {
void execute(Supplier<?> supplier);
void execute(Callable<?> callable);
}
Here, Supplier
and Callable
are functional interfaces
whose single abstract methods do not take any parameters and return a non-void value.
As a result, the type of the lambda cannot be inferred at the call site unless an explicit cast is used.