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Can instance methods replace class methods in programming?
No. never. An instance method cannot replace a class method because: Instance Methods - are normal methods that are linked to a class object instance Class Methods - are static methods that are not linked to any class object. These methods are not interchangeable and will create too many issues if we try to use one in place of the other.
Is the default access specifier same as protected?
A private member of a class can only be accessed by methods of that class. A protected member of a class can only be accessed by methods of that class and by methods of a derived class of that class.
What is the difference between a class method and an instance method?
Instance methods can be called by the object of a Class whereas static method are called by the Class. When objects of a Class are created, they have their own copy of instance methods and variables, stored in different memory locations. Static Methods and variables are shared among all the objects of the Class, stored in one fixed location in memory.Static methods cannotaccess instance variables or instance methods directly-they must use an object reference. Also, class methods cannot use the this keyword as there is no instance for this to refer to.
Math class is an example of which class?
It is a static class; meaning that all the methods can be accessed directly from the class name, without instantiating an object.It is a static class; meaning that all the methods can be accessed directly from the class name, without instantiating an object.It is a static class; meaning that all the methods can be accessed directly from the class name, without instantiating an object.It is a static class; meaning that all the methods can be accessed directly from the class name, without instantiating an object.
What happens if a class doesn't implement all the methods defined in the interface?
It depends on how the class is declared.If the class is a normal class - Then the compiler will complain. All the methods in an interface must be implemented by the class to successfully compile the classIf the class is declared as abstract - Then the compiler will ignore the fact that a few methods are not implemented
What the difference between the domain model class diagram and the design class diagram?
The domain model class diagram focuses on representing the conceptual structure of the domain, highlighting key entities, their attributes, and relationships without considering implementation specifics. In contrast, the design class diagram includes details that are relevant for implementation, such as methods, visibility, and design patterns. While the domain model is more abstract and reflects business logic, the design class diagram is more concrete, guiding developers in coding and system architecture.
Class diagram for payroll management system?
class diagram for payroll system
Difference between class diagram and object diagram with necessary diagram and figure?
Class diagram represent generalized view of system while object diagram represent view of a system at a particular instant.
Can instance methods replace class methods in programming?
No. never. An instance method cannot replace a class method because: Instance Methods - are normal methods that are linked to a class object instance Class Methods - are static methods that are not linked to any class object. These methods are not interchangeable and will create too many issues if we try to use one in place of the other.
When are class methods appropriate?
Static methods or class methods are usually used when you want functionality to be executed without creating an instance of the class where that piece of code resides.
What is the difference between conceptual class Diagram and Design level class Diagram?
one is a diagram like a chart or graph, and one is a design like a blue print
Why is a class diagram useful?
---- A class diagram is useful, because if you didn't know what something looked like, then you would be pretty dumb
Is the default access specifier same as protected?
A private member of a class can only be accessed by methods of that class. A protected member of a class can only be accessed by methods of that class and by methods of a derived class of that class.
A diagram which shows relationship between two or more entities?
Class diagram
What is the difference between a class method and an instance method?
Instance methods can be called by the object of a Class whereas static method are called by the Class. When objects of a Class are created, they have their own copy of instance methods and variables, stored in different memory locations. Static Methods and variables are shared among all the objects of the Class, stored in one fixed location in memory.Static methods cannotaccess instance variables or instance methods directly-they must use an object reference. Also, class methods cannot use the this keyword as there is no instance for this to refer to.
Math class is an example of which class?
It is a static class; meaning that all the methods can be accessed directly from the class name, without instantiating an object.It is a static class; meaning that all the methods can be accessed directly from the class name, without instantiating an object.It is a static class; meaning that all the methods can be accessed directly from the class name, without instantiating an object.It is a static class; meaning that all the methods can be accessed directly from the class name, without instantiating an object.
What is factory methods?
Factory methods are merely a convention whereby static methods in a class return an instance of that class. The InetAddress class has no visible constructors. In InetAddress the 3 factory methods getLocalHost, getByName, getAllByName can be used to create instances of InetAddress.
