So the reason to use the @Override annotation is to explicitly declare method overriding. Its a Java annotation (not Android-specific). You use it to mean for this method to override a method. … The author intended this to override the superclass’ equals method, but it does not (The parameter type should be Object ).
Why is @override used?
@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.
Does @override do anything?
The @Override annotation indicates that the child class method is over-writing its base class method. It extracts a warning from the compiler if the annotated method doesn’t actually override anything. It can improve the readability of the source code.
Is @override compulsory?
The @Override annotation allows the compiler to ensure you’re actually overriding a method or implementing an interface method (Java 6+). … It’s not mandatory, but it’s a good idea, and is free help from the compiler.
What does @override do in flutter?
The annotation @override marks an instance member as overriding a superclass member with the same name. The annotation applies to instance methods, getters and setters, and to instance fields, where it means that the implicit getter and setter of the field is marked as overriding, but the field itself is not.
Why we Cannot override static method?
Overloading is the mechanism of binding the method call with the method body dynamically based on the parameters passed to the method call. Static methods are bonded at compile time using static binding. Therefore, we cannot override static methods in Java.
Why overriding is used in Java?
The benefit of overriding is: ability to define a behavior that’s specific to the subclass type, which means a subclass can implement a parent class method based on its requirement. In object-oriented terms, overriding means to override the functionality of an existing method.
What does override mean?
(Entry 1 of 2) transitive verb. 1 : to ride over or across : trample overrode the thin line of defenders. 2 : to ride (an animal, such as a horse) too much or too hard.
Can we override static method?
Can we Override static methods in java? We can declare static methods with the same signature in the subclass, but it is not considered overriding as there won’t be any run-time polymorphism. Hence the answer is ‘No’.
What is override code?
Method overriding, in object-oriented programming, is a language feature that allows a subclass or child class to provide a specific implementation of a method that is already provided by one of its superclasses or parent classes.
Can we override interface method?
If a base class already implements an interface and a derived class needs to implement the same interface but needs to override certain methods, you must reimplement the interface and set only the interface methods which need overriding. Both implement the ViewerEditable interface. …
Can we override default method?
If any class in the hierarchy has a method with same signature, then default methods become irrelevant. A default method cannot override a method from java. … So even if we have Object class methods defined as default methods in interfaces, it will be useless because Object class method will always be used.
Can we override protected method to private?
Yes, the protected method of a superclass can be overridden by a subclass. If the superclass method is protected, the subclass overridden method can have protected or public (but not default or private) which means the subclass overridden method can not have a weaker access specifier.
What is override in Dart?
The annotation @override marks an instance member as overriding a superclass member with the same name. The annotation applies to instance methods, getters and setters, and to instance fields, where it means that the implicit getter and setter of the field is marked as overriding, but the field itself is not.
How do you initState in flutter?
initState method Null safety
- In initState, subscribe to the object.
- In didUpdateWidget unsubscribe from the old object and subscribe to the new one if the updated widget configuration requires replacing the object.
- In dispose, unsubscribe from the object.
What is a scaffold in flutter?
Scaffold is a class in flutter which provides many widgets or we can say APIs like Drawer, SnackBar, BottomNavigationBar, FloatingActionButton, AppBar etc. Scaffold will expand or occupy the whole device screen. … Scaffold will provide a framework to implement the basic material design layout of the application.