Tuesday, August 22, 2017

Imperative vs Functional programming, a simple example

Today a colleague was asking me the difference between functional and traditional programming in Java... I made a simple example to show how a FUNCTION can be used as a parameter, and the importance of Streams.... of course, in this example the traditional programming is much simpler and readable! Often functional programs can be really hard to decipher!

import java.util.Arrays;

public class HelloWorld
  static String[] theStrings = new String[] {"Pippo", "Pluto", "Paperino"};

  public static void main(String[] args) {

  static void theTraditionalWay() {
    for (int i = 0; i < theStrings.length; i++) System.out.println(theStrings[i].toUpperCase());

  static void theFunctionalWay() {

You can run it here https://www.compilejava.net/

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