Java : Must Know Functional Programming Features
Ways to Make Java Functionally Fun
Functional programming brings clarity and efficiency to Java applications. In this guide, we’ll explore ten strong functional programming features available in Java, explained in simple language with practical code examples to help you improve your coding skills.
Lambda Expressions
Lambda expressions enable you to treat functionality as method arguments or code as data. They provide a clear and concise way to implement single-method interfaces (functional interfaces) using an expression.
List<String> names = Arrays.asList("Alice", "Bob", "Charlie");
names.forEach(name -> System.out.println(name));
The lambda expression name -> System.out.println(name)
passes each element of the list names
to the println
method.
Functional Interfaces
A functional interface is an interface that contains exactly one abstract method. They can be implemented using lambda expressions, method references, or anonymous classes.
@FunctionalInterface
interface Greeting {
void sayHello(String name);
}
public class FunctionalInterfaceExample {
public static void main(String[] args) {
Greeting greeting = (name) ->…