Skip to content
Related Articles

Related Articles

Improve Article

final variables in Java

  • Difficulty Level : Basic
  • Last Updated : 22 Mar, 2017

In Java, when final keyword is used with a variable of primitive data types (int, float, .. etc), value of the variable cannot be changed.

For example following program gives error because i is final.

public class Test {
    public static void main(String args[]) {
        final int i = 10;
        i = 30; // Error because i is final.

When final is used with non-primitive variables (Note that non-primitive variables are always references to objects in Java), the members of the referred object can be changed. final for non-primitive variables just mean that they cannot be changed to refer to any other object

class Test1 {
   int i = 10;
public class Test2 {
    public static void main(String args[]) {
      final Test1 t1 = new Test1();
      t1.i = 30// Works

Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.

Attention reader! Don’t stop learning now. Get hold of all the important Java Foundation and Collections concepts with the Fundamentals of Java and Java Collections Course at a student-friendly price and become industry ready. To complete your preparation from learning a language to DS Algo and many more,  please refer Complete Interview Preparation Course.

My Personal Notes arrow_drop_up
Recommended Articles
Page :