Can we override final method?

You can declare some or all of a class's methods final. You use the final keyword in a method declaration to indicate that the method cannot be overridden by subclasses. The Object class does this—a number of its methods are final .

What happens if we override a final method?

A method declared with the final keyword, then it is known as the final method. The final method can't be overridden. A final method declared in the Parent class cannot be overridden by a child class. If we try to override the final method, the compiler will throw an exception at compile time.

Can final class method be overridden?

Any method that is declared as final in the superclass cannot be overridden by a subclass. If we try to override the final method of super class we will get an error in Java.

Can we override protected final method?

Yes, the protected method of a superclass can be overridden by a subclass.

Can we overload and override final method?

Yes, overloading a final method is perfectly legitimate.

can we inherit and override final method in java?

Can we 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.

Can method be declared static?

Static methods

When a method is declared with the static keyword, it is known as the static method. The most common example of a static method is the main( ) method. As discussed above, Any static member can be accessed before any objects of its class are created, and without reference to any object.

Can we override final method of abstract class?

Declaring abstract method final

Similarly, you cannot override final methods in Java. But, in-case of abstract, you must override an abstract method to use it. Therefore, you cannot use abstract and final together before a method.

Can we override finalize method in Java?

The finalize() method is a pre-defined method in the Object class and it is protected. The purpose of a finalize() method can be overridden for an object to include the cleanup code or to dispose of the system resources that can be done before the object is garbage collected.

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.

Why final methods Cannot be overridden?

Final cannot be overridden because that is the purpose of the keyword, something that cannot be changed or overridden. The purpose of inheritance and polymorphism is to have objects of same class implementing methods (not the names but the code in the methods) in different ways.

Can we inherit final class?

The final modifier for finalizing the implementations of classes, methods, and variables. The main purpose of using a class being declared as final is to prevent the class from being subclassed. If a class is marked as final then no class can inherit any feature from the final class. You cannot extend a final class.

Can we overload main method?

Yes, we can overload the main method in Java, but When we execute the class JVM starts execution with public static void main(String[] args) method.

Which method we Cannot be override?

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 final variable?

A final variable means that the value of variable cannot be changed after it is initialized. It doesn't mean it cannot be overridden. A final method means that the method of a class cannot be overridden by a subclass.

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.

How can we override finalize?

The finalize method, which is present in the Object class, has an empty implementation. In our class, clean-up activities are there. Then we have to override this method to define our clean-up activities. In order to Override this method, we have to define and call finalize within our code explicitly.

What is the difference between Finalize () and garbage collector?

System. gc() forces the garbage collector to run, while the Finalize() method of your object defines what garbage collector should do when collecting this specific object.

Why Finalize method is protected?

The finalize() method is not public because it should only be invoked by JVM and not by anyone else and protected so that it can be overridden by the subclasses. Java uses a finalize method for garbage collection. Before an object is garbage collected, the runtime system calls its finalize() method.

Can we use static method in interface?

Static methods in an interface since java8

Since Java8 you can have static methods in an interface (with body). You need to call them using the name of the interface, just like static methods of a class.

Can we declare interface as final?

If you make an interface final, you cannot implement its methods which defies the very purpose of the interfaces. Therefore, you cannot make an interface final in Java. Still if you try to do so, a compile time exception is generated saying “illegal combination of modifiers − interface and final”.

Can we declare constructor as final?

No, a constructor can't be made final. A final method cannot be overridden by any subclasses. As mentioned previously, the final modifier prevents a method from being modified in a subclass. The main intention of making a method final would be that the content of the method should not be changed by any outsider.

Can we make constructor 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 I declare local variable as static?

In Java, a static variable is a class variable (for whole class). So if we have static local variable (a variable with scope limited to function), it violates the purpose of static. Hence compiler does not allow static local variable.

Can we call static variable in static method?

You can not declare varibale as static inside a method. Inside method all variables are local variables that has no existance outside this method thats why they cann't be static.