What is the class field?

In object -oriented computer programming, the class field can refer to one of two types of data structures. Some programmers use this term to describe the standard type of data of the field composed of elements that are examples of the object of the class. It can also be an encapsulated class field object, also known as the packaging object, which is used instead of a scalar field to make various methods for use when managing fields. Although there may be more complicated functions, the packaging field is really no different in the concept than packaging objects for other scalar data types such as integers or characters. In both cases, the structure can only be used in the context of an object -oriented programming language that supports classes.

The first definition of the class field identifies it as a standard data type of field, which is declared to be held by objects installed from a single specific class. It is commonly doneIt is due to a set of a series of objects, especially if I know the maximum number of objects, so the field is not declared with an excessive amount of elements. Polymorphic mechanisms in object -oriented programming mean that the use of a class field can be very dynamic because it can hold a generic Supertrus, allowing them to hold different subclass as elements despite their implementations. However, one complication when using the class field may occur when the number of elements is not known and either grows larger than the defined field size, or is very small, so it allows unnecessary memory space to the field. The solution is to use the collection type objects, such as vectors or field fields instead of a scalar field that cannot be changed.

The second definition of the class field is an object that contains a scalar field, but also provides a number of methods for handling and changing fields. Some languages ​​implement very efficient ting soralgorithms and search in class. Another advantage in using a field that is implemented as a class,It is that the class can easily be handed over and changed by various functions and methods, especially if the class of the basic field is from the class of general objects. The class field is often the basis for other types of classes based on fields in the programming library, such as field field or hash table. In addition, some languages ​​allow you to expand the field class, which means that the user can redefine some basic methods with more specialized implementations while maintaining the basic function of the class.