- Is constructor by default final?
- Can we override final method if not why?
- Can you have 2 constructors in Java?
- Can final variables be overridden?
- Can we override the constructor?
- What does override mean?
- Can we make constructors static?
- Can we override main method?
- Why constructors are not inherited?
- Can we make constructor final?
- Can we override static method?
- Can we override private method?
- Which methods Cannot be overridden?
- Why data members Cannot be overridden?
- Can constructor be private?
- Can a constructor be static?
- Why can’t a constructor be final?
- Why we Cannot override static method?
Is constructor by default final?
apply a final keyword to a method means you cannot override that method.
but by default in java no constructor can be overridden.
so there is no need to use final keyword with a constructor .
A constructor can’t inherited so can’t be overridden , so there is no use of making constructor final..
Can we override final method if not why?
A final method in a superclass cannot be overridden in a subclass—this guarantees that the final method implementation will be used by all direct and indirect subclasses in the hierarchy. Methods that are declared private are implicitly final , because it’s not possible to override them in a subclass.
Can you have 2 constructors in Java?
A class can have multiple constructors, as long as their signature (the parameters they take) are not the same. You can define as many constructors as you need. When a Java class contains multiple constructors, we say that the constructor is overloaded (comes in multiple versions).
Can final variables be overridden?
A final method cannot be overridden. Which means even though a sub class can call the final method of parent class without any issues but it cannot override it.
Can we override the constructor?
Constructor looks like method but it is not. It does not have a return type and its name is same as the class name. But, a constructor cannot be overridden. If you try to write a super class’s constructor in the sub class compiler treats it as a method and expects a return type and generates a compile time error.
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. to extend beyond or spread over; overlap.
Can we make constructors static?
No, we cannot define a static constructor in Java, If we are trying to define a constructor with the static keyword a compile-time error will occur. In general, static means class level. A constructor will be used to assign initial values for the instance variables.
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.
Why constructors are not inherited?
A subclass inherits all the members (fields, methods, and nested classes) from its superclass. Constructors are not members, so they are not inherited by subclasses, but the constructor of the superclass can be invoked from the subclass.
Can we make constructor final?
No, a constructor can’t be made final. A final method cannot be overridden by any subclasses. … In other words, constructors cannot be inherited in Java therefore, there is no need to write final before constructors.
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’.
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.
Which methods 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.
Why data members Cannot be overridden?
Because instance variables CANNOT be overridden in Java. In Java, only methods can be overridden. When you declare a field with the same name as an existing field in a superclass, the new field hides the existing field. … Because overriding variables would fundamentally break code in the superclass.
Can constructor be private?
Yes, we can declare a constructor as private. If we declare a constructor as private we are not able to create an object of a class. We can use this private constructor in the Singleton Design Pattern.
Can a constructor be static?
A static constructor does not take access modifiers or have parameters. A class or struct can only have one static constructor. Static constructors cannot be inherited or overloaded. A static constructor cannot be called directly and is only meant to be called by the common language runtime (CLR).
Why can’t a constructor be final?
No Constructors can NEVER be declared as final. Your compiler will always give an error of the type “modifier final not allowed” Final, when applied to methods, means that the method cannot be overridden in a subclass. Constructors are NOT ordinary methods. … So there is NO SENSE in declaring it final.
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).