How do you override a class variable in Java?

In short, no, there is no way to override a class variable. You do not override class variables in Java you hide them. Overriding is for instance methods.

Can I override a variable in Java?

Variables are not polymorphic in Java; they do not override one another. There is no polymorphism for fields in Java. Variables decision happens at a compile time so always Base Class variables (not child’s inherited variables) will be accessed.

How do you override a field in Java?

As mentioned earlier, in Java fields cannot be overridden in a subclass. If you define a field in a subclass with the same name as a field in the superclass, the field in the subclass will hide (shadow) the field in the superclass. If the subclass tries to access the field, it will access the field in the subclass.

Can child classes override properties of their parents Java?

// Hiding Parent class’s variable `x` by defining a variable in child class with same name. Well generally, we will say Child class will override the variable declared in the Parent class and parent. Because variables in Java do not follow polymorphism and overriding is only applicable to methods but not to variables.

What is super () in java?

The super keyword in Java is a reference variable which is used to refer immediate parent class object. Whenever you create the instance of subclass, an instance of parent class is created implicitly which is referred by super reference variable. super can be used to invoke immediate parent class method.

Why we can not override static method?

Static methods cannot be overridden because they are not dispatched on the object instance at runtime. The compiler decides which method gets called. Static methods can be overloaded (meaning that you can have the same method name for several methods as long as they have different parameter types).

How can we avoid serialization?

There are several methods for preventing a field from being serialized:

  1. Declare the field as private transient.
  2. Define the serialPersistentFields field of the class in question, and omit the field from the list of field descriptors.

Is it possible to override a variable in Java?

Override Variable: Java supports overloaded variables. But actually these are two different variables with same name, one in the parent class and one in the child class. And both variables can be either of the same datatype or different.

Can a subclass override a method in Java?

In the previous chapter, we talked about superclasses and subclasses. If a class inherits a method from its superclass, then there is a chance to override the method provided that it is not marked final.

What does overriding mean in Java object oriented programming?

Overriding in Java In any object-oriented programming language, Overriding is a feature that allows a subclass or child class to provide a specific implementation of a method that is already provided by one of its super-classes or parent classes.

Do you need the same return type for overriding method in Java?

The overriding method must have same return type (or subtype) : From Java 5.0 onwards it is possible to have different return type for a overriding method in child class, but child’s return type should be sub-type of parent’s return type.