What is compile-time polymorphism in Java?

Compile time polymorphism or static method dispatch is a process in which a call to an overloading method is resolved at compile time rather than at run time. In this process, we done overloading of methods is called through the reference variable of a class here no need to superclass.

What is a compile time polymorphism?

What Is Compile-time Polymorphism? Compile-time polymorphism is obtained through method overloading. The term method overloading allows us to have more than one method with the same name. Since this process is executed during compile time, that's why it is known as Compile-Time Polymorphism.

What is compile time run time polymorphism in Java?

Its is a concept by which we can perform single task in multiple ways. There are two types of polymorphism one is Compile-time polymorphism and another is run-time polymorphism. Method overloading is the example of compile time polymorphism and method overriding is the example of run-time polymorphism. Sr.

What is compile time runtime?

Compile time is the period when the programming code (such as C#, Java, C, Python) is converted to the machine code (i.e. binary code). Runtime is the period of time when a program is running and generally occurs after compile time.

Why do we need compile time polymorphism in Java?

Polymorphism in Java refers to an object's capacity to take several forms. Polymorphism allows us to perform the same action in multiple ways in Java.

Java Polymorphism: Compile time vs. Run time. Method Overloading vs. Overriding #17

Why compile time polymorphism is called static polymorphism?

Method Overloading is known as Static Polymorphism and also Known as Compile Time Polymorphism or Static Binding because overloaded method calls get resolved at compile time by the compiler on the basis of the argument list and the reference on which we are calling the method.

Why we called method overloading is compile time polymorphism?

Compile Time Polymorphism in Java is when you have the several methods with same name and different parameters and compiler has to decide how to select which method has to run based on the arguments hence the name Compile time polymorphism or method overloading.

What is the other name of compile time polymorphism?

What is the other name of compile-time polymorphism? Explanation: Compile-time polymorphism is also known as static polymorphism as it is implemented during the compile-time.

What is difference between method overloading and method overriding?

Method overloading is a compile-time polymorphism. Method overriding is a run-time polymorphism. It helps to increase the readability of the program. It is used to grant the specific implementation of the method which is already provided by its parent class or superclass.

What is the difference between static and runtime polymorphism?

In Static Polymorphism, the call is settled by the compiler, whereas; In Run time Polymorphism, the call isn't settled by the compiler. It is otherwise called as Compile-time Polymorphism and Early binding, whereas; it is otherwise called Dynamic binding, Late binding and overriding also.

What is the use of runtime polymorphism?

Runtime polymorphism is also known as dynamic polymorphism or late binding. In runtime polymorphism, the function call is resolved at run time. In contrast, to compile time or static polymorphism, the compiler deduces the object at run time and then decides which function call to bind to the object.

How polymorphism is achieved at compile time and runtime?

Compile Time Polymorphism:

The compile time polymorphism can be achieved by function overloading or by operator overloading. The overloaded functions are invoked by matching the type and number of arguments and this is done at the compile time so, compiler selects the appropriate function at the compile time.

What is dynamic polymorphism?

Dynamic polymorphism is a process or mechanism in which a call to an overridden method is to resolve at runtime rather than compile-time. It is also known as runtime polymorphism or dynamic method dispatch. We can achieve dynamic polymorphism by using the method overriding.

Can we override 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. The calling of method depends upon the type of object that calls the static method.

Can we override private method in Java?

You cannot override a private or static method in Java. If you create a similar method with same return type and same method arguments in child class then it will hide the super class method; this is known as method hiding. Similarly, you cannot override a private method in sub class because it's not accessible there.

Can Final methods be overloaded?

Can We Override a Final Method? No, the Methods that are declared as final cannot be Overridden or hidden.

Can we override main method in Java?

Overriding main method

You cannot override static methods and since the public static void main() method is static we cannot override it.

Can we have 2 main methods in Java?

From the above program, we can say that Java can have multiple main methods but with the concept of overloading. There should be only one main method with parameter as string[ ] arg.

Can we overload constructor?

Yes! Java supports constructor overloading. In constructor loading, we create multiple constructors with the same name but with different parameters types or with different no of parameters.

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 a final class be abstract?

If you declare a class abstract, to use it, you must extend it and if you declare a class final you cannot extend it, since both contradict with each other you cannot declare a class both abstract and final if you do so a compile time error will be generated.

Can a main () method be overloaded?

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.

Can a final class be instantiated?

You can instantiate a final class just like any other non-abstract class. The only limitation is that you cannot create subclasses of a final class.

Can we declare interface as private?

Therefore, the members of an interface cannot be private. If you try to declare the members of an interface private, a compile-time error is generated saying “modifier private not allowed here”.