If you want to master functional programming, the best place to start is with the Java Function interface. This example will show you four different ways to implement this functional interface in your ...

In this functional programming tutorial, we will work through a Java Supplier interface example. Java’s functional supplier interface can be used any time a function needs to generate a result without ...

Say you needed to use that fancy string sorter in several places. In Java, we could create a functional interface to share that operation: static class LastNameComparator implements java.util ...

Can have instance mutable fields, parameters, or local variables. Only functional interfaces can use the lambda feature in Java. Abstract classes with only one abstract method cannot use lambdas.

"This interesting snapshot of a sizable number of survey respondents suggests not only an intent to upgrade to Java 8 relatively quickly, but real interest in the new functional programming ...