constructor

简明释义

英[kənˈstrʌktə(r)]美[kənˈstrʌktər]

n. 构造函数；构造器；建造者

复 数 c o n s t r u c t o r s

英英释义

单词用法

同义词

反义词

例句

1.Its constructor creates the Shared memory and objects in it.

它的构造函数创建共享内存及其中的对象。

2.One form of the LocalResourceManager's constructor takes a widget.

其构造函数的一种形式采用了小部件。

3.Note that the site's constructor accepts a designer host instance.

请注意，站点的构造函数接受设计器宿主实例。

4.Its constructor will create a connection to the LDAP directory.

其构造函数将会创建一个对LDAP目录的连接。

5.Do not provide a no-argument constructor.

不要提供一个无参数的构造函数。

6.Provide a constructor.

提供构造函数。

7.You must have a public default constructor.

您必须具有公共缺省构造器。

8.No constructor exists for creating a record store.

没有用于创建记录存储的构造函数。

9.In programming, a constructor is a special method used to initialize objects.

在编程中，构造函数是一种特殊的方法，用于初始化对象。

10.When creating an instance of a class, the constructor is automatically called.

创建类的实例时，构造函数会自动被调用。

11.In JavaScript, the constructor property returns the function that created the instance's prototype.

在JavaScript中，构造函数属性返回创建实例原型的函数。

12.You can overload a constructor to accept different parameters.

您可以重载一个构造函数以接受不同的参数。

13.The constructor of the class sets default values for the properties.

类的构造函数为属性设置默认值。

作文

In the realm of programming, particularly in object-oriented languages, the term constructor refers to a special type of method that is automatically invoked when an instance of a class is created. This method plays a crucial role in initializing the newly created object, assigning values to its attributes, and setting up any necessary resources. Understanding the function of a constructor is fundamental for anyone looking to write effective and efficient code. When a class is defined, it can include one or more constructors. These methods often have the same name as the class itself, which helps in identifying them easily. For example, in a class named 'Car', the constructor might also be named 'Car'. This naming convention is not only syntactically correct but also semantically meaningful, as it indicates that this method is responsible for constructing instances of the 'Car' class. A typical use case for a constructor is to initialize properties of an object. For instance, if we have a class that represents a 'Book', the constructor can take parameters such as title, author, and publication year, and assign these values to the respective attributes of the class. This ensures that every time a new 'Book' object is created, it starts with a complete set of information. Moreover, constructors can also handle default values. If the user does not provide certain parameters while creating an object, the constructor can assign default values to those attributes. This feature enhances the flexibility of the class and makes it easier for developers to create objects without worrying about providing every single detail. In addition to basic initialization, constructors can also manage resources that are necessary for the object’s functionality. For example, if a class requires a connection to a database, the constructor can establish that connection when the object is created. This approach ensures that all necessary resources are allocated right from the start, reducing the chances of runtime errors related to uninitialized resources. Another important aspect of constructors is their ability to facilitate inheritance. In object-oriented programming, when a class inherits from another class, the constructor of the parent class can be called within the child's constructor. This practice allows the child class to inherit and initialize the properties of the parent class seamlessly. By using the 'super' keyword in languages like Java or Python, developers can ensure that the parent class's constructor is executed before the child class's constructor, thus maintaining the integrity of the object hierarchy. In summary, the concept of a constructor is vital for understanding object-oriented programming. It serves as the foundation upon which objects are built, initialized, and managed throughout their lifecycle. By mastering the use of constructors, programmers can create robust and flexible applications that effectively utilize the principles of encapsulation, inheritance, and polymorphism. As you delve deeper into programming, remember that the constructor is not just a method; it is a gateway to creating meaningful and functional objects in your code. In Chinese, the term constructor can be translated as "构造函数", which literally means a function that constructs or builds something. This translation encapsulates the essence of what a constructor does in programming—it constructs instances of classes, setting the stage for further operations and interactions within the software.

在编程领域，尤其是在面向对象的语言中，术语constructor指的是一种特殊类型的方法，当一个类的实例被创建时，该方法会自动调用。这个方法在初始化新创建的对象、为其属性分配值以及设置任何必要资源方面起着至关重要的作用。理解constructor的功能对于任何想要编写有效且高效代码的人来说都是基础。当定义一个类时，它可以包含一个或多个constructors。这些方法通常与类名相同，这有助于轻松识别它们。例如，在一个名为“Car”的类中，constructor也可能被命名为“Car”。这种命名约定不仅在语法上是正确的，而且在语义上也是有意义的，因为它表明该方法负责构建“Car”类的实例。constructor的典型用例是初始化对象的属性。例如，如果我们有一个表示“Book”的类，constructor可以接受标题、作者和出版年份等参数，并将这些值分配给类的相应属性。这确保每次创建新的“Book”对象时，它都以完整的信息集开始。此外，constructors还可以处理默认值。如果用户在创建对象时没有提供某些参数，constructor可以为这些属性分配默认值。这个特性增强了类的灵活性，使开发人员能够创建对象而无需担心提供每一个细节。除了基本的初始化之外，constructors还可以管理对象功能所需的资源。例如，如果一个类需要与数据库建立连接，constructor可以在对象创建时建立该连接。这种方法确保所有必要的资源从一开始就被分配，从而减少与未初始化资源相关的运行时错误的机会。constructors的另一个重要方面是它们能够促进继承。在面向对象的编程中，当一个类继承另一个类时，子类的constructor可以在父类的constructor中被调用。这种做法允许子类无缝地继承和初始化父类的属性。通过在Java或Python等语言中使用“super”关键字，开发人员可以确保在执行子类的constructor之前执行父类的constructor，从而维护对象层次结构的完整性。总之，constructor的概念对于理解面向对象编程至关重要。它作为构建、初始化和管理对象生命周期的基础。通过掌握constructors的使用，程序员可以创建强大而灵活的应用程序，有效利用封装、继承和多态的原则。当你深入研究编程时，请记住，constructor不仅仅是一个方法；它是创建代码中有意义和功能对象的入口。在中文中，术语constructor可以翻译为“构造函数”，这字面意思是构建或建立某物的函数。这个翻译概括了constructor在编程中的本质——它构建类的实例，为软件中的进一步操作和交互奠定基础。