Interface Callback

  • Functional Interface:
    This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

    public interface Callback
    A generic functional interface that is more semantically sound than Runnable. Use anywhere you wish to have a generic callback function.
    • Method Detail

      • dummy

        static Callback dummy()
        Creates a dummy callback function. This is useful to avoid using null.
        a dummy callback function
      • dummyIfNull

        static Callback dummyIfNull​(Callback c)
        Returns the given callback object if it is not null. Otherwise, a dummy() callback is returned. This is useful to avoid using null.
        c - the callback function to check for null
        a non-null callback function
      • call

        void call()
        The method that will be called.