- Why we Cannot override static method?
- What does super () do?
- What does override mean?
- How do I override toString method?
- How do you call a super class method?
- Can we override static method?
- Can we override method in same class?
- What is not type of inheritance?
- When an overridden method is called from within a subclass?
- How do you call superclass version of an overriding method in sub class?
- Can abstract class have constructor?
- Is Super called automatically Java?
- What is overriding in OOP?
- Can we override private method?
- Can we override main method?
- How do you call parent class method in overriding?
- Can final method be overridden?
- Which method Cannot be overridden?
Why we Cannot 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)..
What does super () do?
The super keyword refers to superclass (parent) objects. It is used to call superclass methods, and to access the superclass constructor. The most common use of the super keyword is to eliminate the confusion between superclasses and subclasses that have methods with the same name.
What does override mean?
to prevail or have dominance over; have final authority or say over; overrule: to override one’s advisers. to disregard, set aside, or nullify; countermand: to override the board’s veto. to take precedence over; preempt or supersede: to override any other considerations.
How do I override toString method?
The toString() method returns the string representation of the object. If you print any object, java compiler internally invokes the toString() method on the object. So overriding the toString() method, returns the desired output, it can be the state of an object etc. depends on your implementation.
How do you call a super class method?
Java uses the keyword super to call a superclass method. In C++, you would use the name of the superclass with the :: operator instead. For example, the getSalary method of the Manager class would call Employee::getSalary instead of super.
Can we override static method?
Can we override a static method? No, we cannot override static methods because method overriding is based on dynamic binding at runtime and the static methods are bonded using static binding at compile time. So, we cannot override static methods.
Can we override method in same class?
In one class we can not have method with same signature. this is because there is no need to have override method in same class. hence overriding method in same class is not possible, where as if we want to use same method name we can overload method by changing signature.
What is not type of inheritance?
Explanation: Multiple inheritance in java is implemented using interfaces. Multiple interfaces can be implemented by a class. … Explanation: All classes in java are inherited from Object class. Interfaces are not inherited from Object Class.
When an overridden method is called from within a subclass?
When an overridden method is called from within a subclass, it will always refer to the version of that method defined by the subclass. The version of the method defined by the superclass will be hidden.
How do you call superclass version of an overriding method in sub class?
Using the super keyword: When invoking a superclass version of an overridden method the super keyword is used.
Can abstract class have constructor?
Yes! Abstract classes can have constructors! Yes, when we define a class to be an Abstract Class it cannot be instantiated but that does not mean an Abstract class cannot have a constructor. Each abstract class must have a concrete subclass which will implement the abstract methods of that abstract class.
Is Super called automatically Java?
With super(parameter list) , the superclass constructor with a matching parameter list is called. Note: If a constructor does not explicitly invoke a superclass constructor, the Java compiler automatically inserts a call to the no-argument constructor of the superclass.
What is overriding in OOP?
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. … Some languages allow a programmer to prevent a method from being overridden.
Can we override private method?
No, we cannot override private or static methods in Java. Private methods in Java are not visible to any other class which limits their scope to the class in which they are declared.
Can we override main method?
No, we cannot override main method of java because a static method cannot be overridden. The static method in java is associated with class whereas the non-static method is associated with an object. … Therefore, it is not possible to override the main method in java.
How do you call parent class method in overriding?
Invoking overridden method from sub-class : We can call parent class method in overriding method using super keyword. Overriding and constructor : We can not override constructor as parent and child class can never have constructor with same name(Constructor name must always be same as Class name).
Can final method be overridden?
Any method that is declared as final in the superclass cannot be overridden by a subclass.
Which method Cannot be overridden?
A method declared final cannot be overridden. A method declared static cannot be overridden but can be re-declared. If a method cannot be inherited, then it cannot be overridden. A subclass within the same package as the instance’s superclass can override any superclass method that is not declared private or final.