Why method overriding is called run time polymorphism

By looking at the method drive Car c , can you tell which car object, Maruti or Hyundai will run? Hence, the JVM also cannot decide by looking at them at compile time. JVM can only decide at run time, which object Maruti or Hyundai to run. Note that in method overloading you can tell at compile time itself which method will be called, for example, in the below class you know that f will be called with no arguments and f int a will be called if we pass 1 int argument without running the program.

Java virtual machine determines the proper method to call at the runtime , not at the compile time. Joseph 21 Dec Runtime polymorphism or dynamic method dispatch is a process in which a call to an overridden method is resolved at runtime rather than at compile-time. Runtime Polymorphism is nothing but method overriding. In terms of definition runtime polymorphism is declaring multiple methods with same method name and same number of parameters and same data type.

Runtime polymorphism is also called as an dynamic polymorphism. Runtime Polymorphism in Java. Runtime polymorphism or Dynamic Method Dispatch is a process in which a call to an overridden method is resolved at runtime rather than compile-time. In this process, an overridden method is called through the reference variable of a superclass. Other Related Discussions. Why we cannot override static method?

What default access modifier do? Prime Number Algorithm. The advantages of JavaScript far exceed the disadvantages, The advantages o. How did common sense influenc. The youths with similar talents will answer your query. Ask a question and start a new topic! I want to ask a question about core java? Ask a Question. Formatting: Spelling, grammar or punctuation errors.

Personal Attack: Disrespectful content about a person. Insincere Question: Question not seeking real answers. Incorrect Topics: Broad or inaccurate topics. Spam: Link or advertisement for a product. Not in English: Content in a different language. It just compiles at compile time Divine - its comipler time becuase compiler knows that its has to call which method for example if the 2 parameter are there compiler easily detect that its has to call 2 parameter method only Divine- compiler knows about the signature of methods of the class and that can easily be resolved out Usama Qureshi Usama Qureshi 83 2 2 silver badges 13 13 bronze badges.

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The Overflow Blog. Podcast Explaining the semiconductor shortage, and how it might end. Does ES6 make JavaScript frameworks obsolete? Featured on Meta. Now live: A fully responsive profile. Visit chat. Linked 5. Related Hot Network Questions. Question feed. Stack Overflow works best with JavaScript enabled. Accept all cookies Customize settings. At compile-time, java knows which method to call by checking the method signatures.

So this is called compile-time polymorphism or static or early binding. Compile-time polymorphism is achieved through method overloading. Method Overloading says you can have more than one function with the same name in one class having a different prototype.

Function overloading is one of the ways to achieve polymorphism but it depends on technology that which type of polymorphism we adopt. In java, we achieve function overloading at compile-Time. The following is an example where compile-time polymorphism can be observed. Attention reader! Get hold of all the important Java Foundation and Collections concepts with the Fundamentals of Java and Java Collections Course at a student-friendly price and become industry ready. The runtime polymorphism can be achieved by method overriding.