Callable vs Supplier interface in java

Question

The Callable and Supplier functional interfaces in java.util.concurrent and java.util.function packages respectively have the

Answer 1

Apart from the obvious, Callable throwing an exception, the difference is semantic. They have different names because they represent different things. The purpose is to make code easier to understand. When you use a Callable, your interface choice implies that the object is going to be executed by another thread. When you use Supplier you imply that it's just an object that supplies data to another component.