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For example: If the superclass method is declared public then the overridding method in the sub class cannot be either private or protected.Instance methods can be overridden only if they are inherited by the subclass.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.A subclass in a different package can only override the non-final methods declared public or protected.An overriding method can throw any uncheck exceptions, regardless of whether the overridden method throws exceptions or not. (See this for details). ; The overriding method must have same return type (or subtype) : From Java 5.0 onwards it is possible to have different return type for a overriding method in … But I realized, it’s worth sharing some more information on Java Method Overriding.. Rules for method overriding: In java, a method can only be written in Subclass, not in same class. In the previous chapter, we talked about superclasses and subclasses. In our complete software, we just need to pass a list of employees everywhere and call appropriate methods without even knowing the type of employee. If a class inherits a method from its superclass, then there is a chance to override the method provided that it is not marked final.The benefit of overriding is: ability to define a behavior that's specific to the subclass type, which means a subclass can implement a parent class method based on its requirement.In object-oriented terms, overriding means to override the functionality of an existing method.In the above example, you can see that even though Therefore, in the above example, the program will compile properly since Animal class has the method move. For example, we can easily raise the salary of all employees by iterating through the list of employees. If subclass (child class) has the same method as declared in the parent class, it is known as method overriding in Java.. Last week I wrote Java Method Hiding and Overriding: Override Static Method in Java here. ; The argument list should be exactly the same as that of the overridden method.

Lets take a simple example to understand this. In this case the method in parent class is called overridden method and the method in child class is called overriding method. Previous Page. Different types of employees like Manager, Engineer, ..etc may have their implementations of the methods present in base class Employee. Private methods can not be overridden : Private methods cannot be overridden as they are bonded during compile time. Method overriding in Java is a concept based on polymorphism OOPS concept which allows programmer to create two methods with same name and method signature on interface and its various implementation and actual method is called at runtime depending upon type of object at runtime.
We have two classes: A child class Boy and a parent class Human.
Every type of employee may have its logic in its class, we don’t need to worry because if raiseSalary() is present for a specific employee type, only that method would be called.Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.Attention reader! The overriding method has the same name, number and type of parameters, and return type as the … Java - Overriding. If a class inherits a method from its superclass, then there is a chance to override the method provided that it is not marked final. In the case of a concrete subclass, it is forced to implement all methods defined in abstract class if no other superclass implemented it in the hierarchy. By using our site, you Advertisements. In the previous chapter, we talked about superclasses and subclasses. Therefore we can’t even override private methods in a subclass.