- Can method overloading based return types?
- Which is a covariant return type?
- What is covariant return type in method overriding?
- Can you override private method?
- How do you prevent overriding?
- Does return type matters in overloading?
- Can final method override?
- What is difference between function overloading and function overriding?
- Should return type be same in method overloading and overriding?
- What value does read () return when it has reached the end of a file?
- Can a method have two return types?
- Can we override static method?
- What is overriding in Java?
- Can you prevent a class from overriding?
- Which three can vary in overloaded methods?
Can method overloading based return types?
The compiler does not consider the return type while differentiating the overloaded method.
But you cannot declare two methods with the same signature and different return type.
It will throw a compile time error..
Which is a covariant return type?
In object-oriented programming, a covariant return type of a method is one that can be replaced by a “narrower” type when the method is overridden in a subclass. … This usually implies that the return types of the overriding methods will be subtypes of the return type of the overridden method.
What is covariant return type in method overriding?
Covariant return type refers to return type of an overriding method. … Covariant return type works only for non-primitive return types. From Java 5 onwards, we can override a method by changing its return type only by abiding the condition that return type is a subclass of that of overridden method return type.
Can you override private method?
No, a private method cannot be overridden since it is not visible from any other class. You have declared a new method for your subclass that has no relation to the superclass method.
How do you prevent overriding?
In short, its not possible to override private and static method in Java. That’s all about 3 ways to prevent a method from being overridden in Java. Remember, though syntactically you can use private, static and final modifier to prevent method overriding, but you should always use final modifier to prevent overriding.
Does return type matters in overloading?
Overloading with same arguments and different return type − The return type doesn’t matter. If they don’t have different parameters, they both are still considered as same method and a compile time error will be generated.
Can final method override?
Any method that is declared as final in the superclass cannot be overridden by a subclass.
What is difference between function overloading and function overriding?
1) Function Overloading happens in the same class when we declare same functions with different arguments in the same class. … Function Overriding is happens in the child class when child class overrides parent class function.
Should return type be same in method overloading and overriding?
Return type of method does not matter in case of method overloading, it can be same or different. However in case of method overriding the overriding method can have more specific return type (refer this). Argument list should be different while doing method overloading.
What value does read () return when it has reached the end of a file?
What value does read() return when it has reached the end of a file? The read() method returns -1 when it has reached the end of a file.
Can a method have two return types?
As per Java Language Specification, the methods in Java can return only one value at a time. So returning multiple values from a method is theoretically not possible in Java.
Can we override static method?
Can we Override static methods in java? We can declare static methods with same signature in subclass, but it is not considered overriding as there won’t be any run-time polymorphism.
What is overriding in Java?
Method overriding, in object-oriented programming, is a language feature that allows a subclass or child class to provide a specific implementation of a method that is already provided by one of its superclasses or parent classes.
Can you prevent a class from overriding?
To prevent being overridden, use the sealed in C#. When you use sealed modifiers in C# on a method, then the method loses its capabilities of overriding. The sealed method should be part of a derived class and the method must be an overridden method.
Which three can vary in overloaded methods?
As discussed in the beginning of this guide, method overloading is done by declaring same method with different parameters. The parameters must be different in either of these: number, sequence or types of parameters (or arguments). Lets see examples of each of these cases.