What is function in Java with example?

Static methods : A static method is a method that can be called and executed without creating an object. … Instance methods: These methods act upon the instance variables of a class. … Factory methods: A factory method is a method that returns an object to the class to which it belongs.

In Java 8, Function is a functional interface ; it takes an argument (object of type T) and returns an object (object of type R). The argument and output can be a different type. Function.java. @FunctionalInterface public interface Function<T, R> { R apply(T t); } T – Type of the input to the function.26 Şub 2020

In Java, all function definitions must be inside classes. We also call functions methods. Let’s look at an example method public class Main { public static void foo() { // Do something here } } foo is a method we defined in class Main.