Final arguments to function

In this example we shall show you how to use final arguments to a function. To use final arguments to a function we have performed the following steps:

  • We have created class FinalArgs, that has run() method and a myFunc(final Calendar d) method.
  • The first method calls the second one, that uses a final Calendar argument and changes the Calendar.YEAR field.
  • We create a new instance of FinalArgs and call its run() method. The myFunc(final Calendar d) method is called and the attibute YEAR of final Calendar is changed.
  • If we try to change the calendar though an error will occur, since it is final and cannot be assigned to another value,

as described in the code snippet below.

package com.javacodegeeks.snippets.core;

import java.util.Calendar;

 * Experiment with "final" args to functions (new in 1.1)

public class FinalArgs {

    public static void main(String argv[]) {

  new FinalArgs().run();

    void run() {



  System.out.println("Once upon a time...");

    void myFunc(final Calendar d) {

  // d = null;  // this will not compile

  d.set(Calendar.YEAR, 1999); // this will compile, and changes the object


Once upon a time...

This was an example of how to use final arguments to a function in Java.

Byron Kiourtzoglou

Byron is a master software engineer working in the IT and Telecom domains. He is an applications developer in a wide variety of applications/services. He is currently acting as the team leader and technical architect for a proprietary service creation and integration platform for both the IT and Telecom industries in addition to a in-house big data real-time analytics solution. He is always fascinated by SOA, middleware services and mobile development. Byron is co-founder and Executive Editor at Java Code Geeks.
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