February 2014
Intermediate to advanced
160 pages
4h 59m
English
Content preview from Functional Programming in Java
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Defining a Functional Interface
| | @FunctionalInterface |
| | public interface TailCall<T> { |
| | |
| | TailCall<T> apply(); |
| | |
| | default boolean isComplete() { return false; } |
| | //... |
| | } |
A functional interface must have one abstract—unimplemented—method. It may have zero or more default or implemented methods. It may also have static methods.