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You cannot override a method inside the same class. If you do that, it is called Overloading. Experienced java programmers can clearly identify the difference between overloaded methods and the overridden ones. We just had a detailed look at overridden methods and it is time to take a look at the overloaded ones.
Overloaded methods let you reuse the same method name in a class, but with different arguments (and optionally, a different return type). Overloading a method often means you're being a little nicer to those who call your methods, because your code takes on the burden of coping with different argument types rather than forcing the caller to do conversions prior to invoking your method. The rules are simple:
• Overloaded methods MUST change the argument list.
• Overloaded methods CAN change the return type.
• Overloaded methods CAN change the access modifier.
• Overloaded methods CAN declare new or broader checked exceptions.
• A method can be overloaded in the same class or in a subclass. In other words, if class A defines a doStuff(int i) method, the subclass B could define a doStuff(String s) method without overriding the superclass version that takes an int. So two methods with the same name but in different classes can still be considered overloaded, if the subclass inherits one version of the method and then declares another overloaded version in its class definition.
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Can you override an instance method and make it final?
No. Once a method is declared final in a class, no derivative of that class can override that method.
Any method in a super class can be overridden in its subclass?
False.Any method declared as final cannot be overridden by any subclasses.You also cannot technically override a private method. While your subclass can have a method with the same definition as a private method in the superclass, it does not actually override that method.
Does Every class has a toString method and an equals method inherited from the Object class?
Yes - in Java, every class has this method, which is inherited from the Object class. Often, the inherited method does nothing particularly useful, but you can override it with your own implementation.
How do you create a concrete method inside abstract class?
The same way you create a concrete method in a concrete class. When a class is abstract, it can contain abstract methods. That doesn't mean that all methods must be abstract. Hope this helps.
Why can't method override be used without inheritance?
Overriding a method means that you are replacing an existing or virtual method that has already been defined in the parent object class, so without using inheritance, there can be no existing method to override.
Can you override an instance method and make it final?
No. Once a method is declared final in a class, no derivative of that class can override that method.
What is a example of override?
An override occurs when you create a method of the same name as the one in the parent/super class. Ex: public class A { ..... public String getName(){ } ..... } public class B extends A { ..... public String getName(){ } ..... } Here class B which is the child class of A also declares a method of the same name as in the parent class. This is overriding...
Any method in a super class can be overridden in its subclass?
False.Any method declared as final cannot be overridden by any subclasses.You also cannot technically override a private method. While your subclass can have a method with the same definition as a private method in the superclass, it does not actually override that method.
Does Every class has a toString method and an equals method inherited from the Object class?
Yes - in Java, every class has this method, which is inherited from the Object class. Often, the inherited method does nothing particularly useful, but you can override it with your own implementation.
How do you create a concrete method inside abstract class?
The same way you create a concrete method in a concrete class. When a class is abstract, it can contain abstract methods. That doesn't mean that all methods must be abstract. Hope this helps.
Why can't method override be used without inheritance?
Overriding a method means that you are replacing an existing or virtual method that has already been defined in the parent object class, so without using inheritance, there can be no existing method to override.
When you extend a class and override a method can this new method throw exceptions other than those that were declared by the original method?
No it cannot throw, except for the subclasses of the exceptions thrown by the parent class's method
Why you use overloading and overriding?
Overloading the same method name with different number of arguments (and the data types), and perhaps with a different returned data type. The method signatures are different, only the names are the same. Overriding is to change the same method name with different implementation (the method body). The method signature stays the same.
Is it possible to override the main method in Java?
Theoretically yes. You will use only one main method for your whole java application and hence such a situation will not come up in real life. Imagine: You have a main in class A and one more in class B which extends class A. When you try to run the class B, only that main method will be executed and not the main in class A. So this override is irrelevant and we cannot call class A's main method at all
How is hiding method different from overriding method in c sharp?
Hiding means a class cannot see the definition. Overriding implies that a class must see that to "override"
What is function overriding in Java?
Method overriding is similar to method overloading, with a small difference. In overriding, a method in a parent class is overridden in the child class. The method in the child class will have the same signature as that of the parent class. Since the method in the child class has the same signature & name as the method of its parent class, it is termed as overriding. In situations where you may have to explicitly call the parent class method you can use the "super" keyword and for explicitly calling the current objects method you can use the "this" keyword.
Example program of override?
Override is when a subclass redefines a method it inherited from the superclass.Example:public class Animal {public static void id() {System.out.println("Animal");}}public class Cat extends Animal {public static void hide() {System.out.println("Cat.");}}In this example the method of "hide()" was overridden
