The functional Predicate interface gets used extensively by the Java 8 Streams API. Any developer who wants to master functional programming in Java will need to be comfortable with the Predicate ...

Java 8 introduced predefined functional interfaces (java.util.function) so that developers don’t have create our own functional interfaces for common tasks. Here are a few examples: ...

Next, we refactored a number of those examples again, this time using functional programming language features introduced in Java 8.