Why do we override annotations in Java?

Why do we override annotations in Java?

@Override @Override annotation informs the compiler that the element is meant to override an element declared in a superclass. Overriding methods will be discussed in Interfaces and Inheritance. While it is not required to use this annotation when overriding a method, it helps to prevent errors.

What is override annotation in Java?

The @Override annotation is a standard Java annotation that was first introduced in Java 1.5. The @Override annotation denotes that the child class method overrides the base class method. If the annotated method does not actually override anything, the compiler issues a warning.

How do I override Java?

Rules for method overriding:

1. In java, a method can only be written in Subclass, not in same class.
2. The argument list should be exactly the same as that of the overridden method.
3. The return type should be the same or a subtype of the return type declared in the original overridden method in the super class.

Why do we use the @override in our code?

Why we use @Override annotation As by using this annotation you instruct compiler that you are overriding this method. If you don’t use the annotation then the sub class method would behave as a new method (not the overriding method) in sub class. 2) It improves the readability of the code.

Do I need override annotation?

You NEVER NEED to put an @Override annotation. The @Override annotation informs the compiler that the element is meant to override an element declared in a superclass. It is not required, but it will generate a compile error if that method actually does not correctly override a method in a superclass.

What happens if you don’t write @override?

If you don’t put an @Override tag, but according to the compiler you didn’t override anything, you have a silent bug you don’t know about. It is not required, but it will generate a compile error if that method actually does not correctly override a method in a superclass.

What is the use of Override annotation in Java?

Using @Override annotation while overriding a method is considered as a best practice for coding in java because of the following two advantages: If programmer makes any mistake such as wrong method name, wrong parameter types while overriding, you would get a compile time error.

When to annotate a method to override a superclass method?

It lets the compiler double-check for you when you say (by annotating) that a specified method is supposed to override a superclass method (or implement an interface method in Java 6 or later). If the method does not, in fact, override a superclass method (or implement an interface method), the compiler will flag this as an error.

When to use the @ implements annotation in Java?

Additionally, in Java 1.6 you can use it to mark when a method implements an interface for the same benefits. I think it would be better to have a separate annotation (like @Implements ), but it’s better than nothing. I think it is most useful as a compile-time reminder that the intention of the method is to override a parent method. As an example:

Is it Overkill to use @ override in Java?

There is no overkill when you are coding. It doesn’t cost you anything to type @override, but the savings can be immense if you misspelled a method name or got the signature slightly wrong.