Can we override final methods in Java?

Overriding is a one of the mechanisms to achieve polymorphism. This is the case when we have two classes where, one inherits the properties of another using the extends keyword and, these two classes same method including parameters and return type (say, sample).

Since it is inheritance. If we instantiate the subclass a copy of superclass’s members is created in the subclass object and, thus both methods are available to the subclass.

When we invoke this method (sample) JVM calls the respective method based on the object used to call the method.

Overriding final methods

No, you cannot override final method in java. If you try to do so, it generates a compile time error saying

Example

class Super{
   public final void demo() {
      System.out.println("This is the method of the superclass");
   }
}
class Sub extends Super{
   public final void demo() {
      System.out.println("This is the method of the subclass");
   }
}

Compile time error

Sub.java:7: error: demo() in Sub cannot override demo() in Super
   public final void demo() {
          ^
   overridden method is final
1 error

If you try to compile the same program in eclipse you will get the following error −

Maruthi krishna

Published on 05-Jul-2019 11:05:52

• Related Questions & Answers
• Can we override private methods in Java
• Can we override default methods in Java?
• Can we Overload or Override static methods in Java?
• Why can’t we override static methods in Java?
• Can we override the static method in Java?
• Can we override the main method in java?
• Can we override the equals() method in Java?
• Can we override a start() method in Java?
• Can we override a protected method in Java?
• Can we to override a catch block in java?
• Can we initialize blank final variable in Java
• Can we inherit a final method in Java?
• Can we declare constructor as final in java?
• Can we overload or override a static method in Java?
• Can we override a private or static method in Java