Can we override object class methods in Java?

Can we override object class method in interface?

An interface cannot declare any of the methods of the object class as a default method. This restriction may be surprising, especially since the interface does not inherit from object. Behind the scenes, an interface implicitly declares a public abstract method for most of the object’s method.

Is method overriding allowed in Java?

No, a static method cannot be overridden. It can be proved by runtime polymorphism, so we will learn it later.

Can we override method in same class in Java?

Mainly, overriding is NOT possible in same class otherwise.

Which methods can override in your class?

Same access modifier is also a valid one. private, static and final methods cannot be overridden as they are local to the class. However static methods can be re-declared in the sub class, in this case the sub-class method would act differently and will have nothing to do with the same static method of parent class.

Can we 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).

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Can we override default method?

A default method cannot override a method from java. … The reasoning is very simple, it’s because Object is the base class for all the java classes. 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 constructor be overridden?

Constructors are not normal methods and they cannot be “overridden”. Saying that a constructor can be overridden would imply that a superclass constructor would be visible and could be called to create an instance of a subclass.

What is method overloading example?

In Java, two or more methods may have the same name if they differ in parameters (different number of parameters, different types of parameters, or both). These methods are called overloaded methods and this feature is called method overloading. For example: void func() { ... }

Can we override in the same class?

Therefore, you cannot override two methods that exist in the same class, you can just overload them.

Can abstract class have constructor?

Yes, an Abstract class always has a constructor. If you do not define your own constructor, the compiler will give a default constructor to the Abstract class.

Can we override return type?

Yes. It is possible for overridden methods to have different return type . But the limitations are that the overridden method must have a return type that is more specific type of the return type of the actual method.

Can we overload main method?

Yes, We can overload the main method in java but JVM only calls the original main method, it will never call our overloaded main method. Output: … So, to execute overloaded methods of main, we must call them from the original main method.

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Why method overriding is used?

The purpose of Method Overriding is that if the derived class wants to give its own implementation it can give by overriding the method of the parent class. When we call this overridden method, it will execute the method of the child class, not the parent class.

What is super keyword 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.