At compile-time, the Java compiler determines which method to call based on the number and types of arguments passed in.Īn example to show the concept of Method Overloading is when we pass a different number of parameters to the same function. Method overloading occurs when a class has multiple methods with the same name but different parameters. It is also known as static polymorphism and is achieved through method overloading. Polymorphism in Java can be divided into two main categories explained below in detail: 1. This process of executing two different methods is known as Run Time Polymorphism in Java. Now, in the main method, if the Parent type references the Parent object, then the Parent’s show is executed, but if the Parent type references the Child object, then the Child’s show is executed. The Child class overrides the method show() of the Parent class. In the above example, we have declared a base class named “Parent”, and a subclass named “Child” which extends the class “Parent”. This method overrides show() of show() Let us understand the concept of polymorphism with an example. This can be interpreted as the power button showing different behavior depending on the situation. The same power button can be used for the function of “Switch ON” and “Switch OFF”. TV Remote also exhibits this property of Polymorphism. He may be an Employee, a citizen, a Father, etc therefore, the person exhibits various behaviors depending on the circumstance. A person can have several traits at once. Let’s use a person as an example to better grasp the idea of polymorphism. Real-World Example for Better Understanding: Polymorphism in java also allows for a more abstract view of objects and their behaviors and enables late binding, which means that the appropriate method to be called is determined at runtime. This allows for code reusability and makes the code more efficient and flexible. It is a feature of many programming languages, including Java, that allows the same method or function to be used with different types of data, such as integers, strings, and objects. Polymorphism is a concept in computer science and object-oriented programming that refers to the ability of a single function or method to operate on multiple types of data. "Poly" means "many," and "Morphs" means "shapes." Polymorphism, in layman’s terms, is the ability of a message to be expressed in a variety of ways. Polymorphism is made up of two words: poly and morphs. Other examples of compile time polymorphism are constructor overloading and method hiding.ĩ.IPolymorphism is a key concept in Object-Oriented Programming. How to achieve or implement static polymorphism in Java?Īns: Static polymorphism can be achieved by method overloading. In static polymorphism, the behavior of method is decided at compile-time based on the parameters or arguments of method.Ĩ. What is Compile time polymorphism (Static polymorphism)?Īns: A polymorphism where object binding with methods happens at compile time is called static polymorphism or compile-time polymorphism. Without polymorphism, it is not possible for a child class to execute its own behavior.ħ. On the other hand, polymorphism enables child class to redefine already defined behavior inside parent class. Inheritance helps in code reusability in child class by inheriting behavior from parent class. On the other hand, polymorphism takes the advantage of that relationship to make the program more dynamic.ī. Inheritance represents the parent-child relationship between two classes. What are the differences between Polymorphism and Inheritance in Java?Īns: The differences between polymorphism and inheritance in java are as follows:Ī. The main benefit of using polymorphism is when we can provide implementation to an abstract base class or an interface.Ħ. For example, Java polymorphism example: Inheritance lets derived classes share interfaces and code of their base classes. Also, polymorphism does happen at run time. It allows you to call methods of a class without knowing the exact type of the class. It can only happen in classes that extend one another. Using polymorphism, we can achieve flexibility in our code because we can perform various operations by using methods with the same names according to requirements.ī. Polymorphism is an effect of inheritance. What are the advantages of Polymorphism?Īns: There are the following advantages of polymorphism in java:Ī. How is Inheritance useful to achieve Polymorphism in Java?Īns: Inheritance represents the parent-child relationship between two classes and polymorphism take the advantage of that relationship to add dynamic behavior in the code (or to make the program more dynamic).ĥ. The subclasses can have their own unique implementation for certain features and can also share some of the functionality through inheritance.Ĥ. Ans: Polymorphism in Java can be primarily achieved by subclassing or by implementing an interface.
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