constructors

简明释义

英[/kənˈstrʌktəz/]美[/kənˈstrʌktɚz/]

n. 构造函数；[建]施工人员（constructor 的复数形式）；构造器；建构式

英英释义

单词用法

同义词

反义词

例句

1.Use ROW and list constructors to create lists of fields.

使用ROW和LIST构造函数创建字段列表。

2.There is also at least one disadvantage of Scala’s constraints on constructors.

不过，这样也有至少一个缺点。

3.Constructors build lists, and selectors break lists down.

构造函数构建列表，选择函数分解列表。

4.Instead, widgets take a reference to their parent in their constructors.

相反，窗口小部件可以在其构造函数中引用它们的父代。

5.When creating your own exception types, you should add the extra two constructors also.

当创建自己的异常类型时，您还应该另外添加两个构造函数。

6.Delegating constructors: Read the white paper on delegating constructors.

Delegatingconstructors：阅读关于委托构造器的白皮书。

7.Type constructors are also known as type initializers.

类型构造函数也称为类型初始值设定项。

8.Many constructors in the city are now using eco-friendly materials.

城市中的许多建筑商现在正在使用环保材料。

9.The constructors are working hard to finish the new bridge on time.

这些构建者正在努力按时完成新的桥梁。

10.The software library provides several types of constructors for different data structures.

该软件库提供了几种不同数据结构的构造函数。

11.In programming, constructors are special methods used to create objects.

在编程中，构造函数是用于创建对象的特殊方法。

12.The team of constructors completed the building ahead of schedule.

这支建筑工人团队提前完成了建筑。

作文

In the world of programming, the concept of constructors is essential for understanding how objects are created and initialized. A constructor is a special type of method that is automatically called when an object of a class is instantiated. This mechanism allows developers to set initial values for object attributes, ensuring that the object is in a valid state before it is used. The use of constructors enhances code readability and maintainability, making it easier for programmers to manage complex systems.For instance, consider a simple class representing a 'Car'. When a new 'Car' object is created, the constructor can initialize properties such as the car's make, model, and year. In this way, every time a new car is instantiated, it will have all the necessary information right from the start. This not only saves time but also reduces the chances of errors that could arise from uninitialized variables.Moreover, constructors can also take parameters, allowing for more flexible object creation. For example, a 'Car' class might have a constructor that accepts arguments for make, model, and year. This means that when a new 'Car' is created, the programmer can specify these values directly, rather than having to set them individually after the object has been created. This feature makes constructors particularly powerful and versatile.In addition to their primary role in object initialization, constructors can also be overloaded. This means that a class can have multiple constructors with different parameter lists. Overloading provides flexibility in how objects are created, allowing developers to choose the most appropriate constructor based on the context. For example, one constructor might initialize a 'Car' with default values, while another might allow the user to specify custom values. This capability is especially useful in situations where objects may need to be created in various states or configurations.Furthermore, understanding constructors is crucial for grasping the principles of object-oriented programming (OOP). OOP emphasizes the use of classes and objects, and constructors play a pivotal role in this paradigm. They embody the idea of encapsulation, allowing data and behavior to be bundled together within an object. By using constructors, developers can create robust and modular code that aligns with OOP principles.In conclusion, constructors are a fundamental aspect of object-oriented programming that every developer should understand. They facilitate the creation and initialization of objects, enhance code organization, and promote better software design practices. Whether you are working on a small project or a large-scale application, mastering the use of constructors will undoubtedly improve your programming skills and contribute to the overall quality of your code. Therefore, it is essential to dedicate time to learning how to effectively implement and utilize constructors in your programming endeavors.

在编程的世界中，构造函数这一概念对于理解对象是如何被创建和初始化的至关重要。构造函数是一种特殊类型的方法，在类的对象被实例化时会自动调用。这一机制允许开发者为对象属性设置初始值，确保对象在使用之前处于有效状态。使用构造函数提高了代码的可读性和可维护性，使程序员更容易管理复杂的系统。例如，考虑一个简单的表示“汽车”的类。当创建一个新的“汽车”对象时，构造函数可以初始化诸如汽车品牌、型号和年份等属性。通过这种方式，每当一个新的汽车被实例化时，它将从一开始就拥有所有必要的信息。这不仅节省了时间，还减少了由于未初始化变量而可能引发的错误。此外，构造函数还可以接受参数，从而允许更灵活的对象创建。例如，一个“汽车”类可能有一个接受品牌、型号和年份作为参数的构造函数。这意味着，当创建一个新的“汽车”时，程序员可以直接指定这些值，而不必在对象创建后单独设置它们。这一特性使得构造函数特别强大和多功能。除了在对象初始化中的主要作用外，构造函数还可以被重载。这意味着一个类可以有多个具有不同参数列表的构造函数。重载提供了对象创建的灵活性，允许开发者根据上下文选择最合适的构造函数。例如，一个构造函数可以用默认值初始化“汽车”，而另一个则允许用户指定自定义值。这一能力在需要以各种状态或配置创建对象的情况下尤其有用。此外，理解构造函数对于掌握面向对象编程（OOP）原则至关重要。OOP强调类和对象的使用，而构造函数在这一范式中发挥着关键作用。它们体现了封装的理念，允许数据和行为在对象内部捆绑在一起。通过使用构造函数，开发者可以创建健壮且模块化的代码，从而符合OOP原则。总之，构造函数是每个开发者都应理解的面向对象编程的基本方面。它们促进了对象的创建和初始化，提高了代码的组织性，并推动了更好的软件设计实践。无论您是在进行小型项目还是大型应用程序，掌握构造函数的使用无疑会提高您的编程技能，并有助于提升您代码的整体质量。因此，花时间学习如何有效地实现和利用构造函数是至关重要的。