Which of the following is not true for class in Object-Oriented Approach 以下哪项不适用于面向对象方法中的类 A class represents a collection of objects having same characteristic properties 类表示具有相同特征属性的对象集合 A class is a logical entity Static description 类是逻辑实体 静态描述 Classes are the same as objects 类与对象相同 Classes are abstract 类是抽象的

时间: 2024-04-07 09:30:59 浏览: 108
JAVA

关于类和面向对象

The statement "Classes are the same as objects" is not true for class in Object-Oriented Approach. Classes and objects are two different concepts in object-oriented programming. A class is a blueprint or template for creating objects, while an object is an instance of a class. A class represents a collection of objects having the same characteristic properties, is a logical entity (static description), and is often abstract in nature.
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帮我写出以下java代码：Add a class Bubble that extends Shape. The Bubble class has an instance variable called radius of type double that represents the radius of the bubble. The constructor of the Bubble class takes an x and a y as arguments, which represent the position of the new bubble. The radius of a new bubble is always 10 and never changes after that. The isVisible method indicates whether the bubble is currently visible inside a window of width w and height h (position (0, 0) is in the upper-left corner of the window). The bubble is considered visible if at least one pixel of the bubble is visible. Therefore a bubble might be visible even when its center is outside the window, as long as the edge of the bubble is still visible inside the window. The code of the isVisible method is a little bit complex, mostly because of the case where the center of the circle is just outside one of the corners of the window. So here is the code of the isVisible method, which you can directly copy-paste into your assignment: // Find the point (wx, wy) inside the window which is closest to the // center (x, y) of the circle. In other words, find the wx in the // interval [0, w - 1] which is closest to x, and find the wy in the // interval [0, h - 1] which is closest to y. // If the distance between (wx, wy) and (x, y) is less than the radius // of the circle (using Pythagoras's theorem) then at least part of // the circle is visible in the window. // Note: if the center of the circle is inside the window, then (wx, wy) // is the same as (x, y), and the distance is 0. public boolean isVisible(int w, int h) { double x = getX(); double y = getY(); double wx = (x < 0 ? 0 : (x > w - 1 ? w - 1 : x)); double wy = (y < 0 ? 0 : (y > h - 1 ? h - 1 : y)); double dx = wx - x; double dy = wy - y; return dx * dx + dy * dy <= radius * radius; } The isIn method indicates whether the point at coordinates (x, y) (which are the arguments of the method) is currently inside the bubble or not. The edge of the bubble counts as being inside of the bubble. HINT: use Pythagoras's theorem to compute the distance from the center of the bubble to the point (x, y). The draw method uses the graphics object g to draw the bubble. HINT: remember that the color of the graphics object g is changed in the draw method of the superclass of Bubble. Also add a testBubble method to test all your methods (including inherited methods, but excluding the isVisible method, which I provide, and excluding the draw method since it requires as argument a graphics object g that you

You will need to implement the isIn and draw methods yourself, using Pythagoras's theorem to calculate the distance between the center of the bubble and the given point, and the Graphics object ...

ElementType.FIELD is an enumerated constant in the java.lang.annotation.ElementType enumeration. It represents the type of an element that can be annotated with an annotation in the Java programming language. The possible values of ElementType are: TYPE: Represents a class, interface, enumeration or annotation type declaration. FIELD: Represents a field or property in a class. METHOD: Represents a method in a class. PARAMETER: Represents a parameter in a method or constructor. CONSTRUCTOR: Represents a constructor in a class. LOCAL_VARIABLE: Represents a local variable in a method. ANNOTATION_TYPE: Represents an annotation type declaration. PACKAGE: Represents a package declaration. The ElementType enumeration is used in conjunction with the @Target annotation, which specifies the elements of a program to which an annotation can be applied. For example, if you have an annotation MyAnnotation and you want to specify that it can be applied to fields only, you would write:翻译

"ElementType.FIELD" 是 Java 语言中 java.lang.annotation.ElementType 枚举的一个枚举常量。它表示可以在 Java 编程语言中用注解标记的元素的类型。ElementType 的可能值有：TYPE：表示类、接口、枚举或注解类型...

Use c # to complete the following code,Creating a Car class A class is a self-contained piece of software that is able to function on it own. We will model a car in software. Car Class Properties Year : int «private set» Manufacturer : string «private set» Model : string «private set» IsDrivable : bool «private set» Price : double «private set» Methods«constructor» Car(year : int, manufacturer : string, model : string, price : double, isDrivable: bool = true) PrintInfo() : void Description of field members: 1. year: this private member represents the year value of this object 2. manufacturer: this private member represents the manufacturer of this car 3. model: this private member represents the model of this car 4. isDrivable: this private member indicates if this car be driven 5. price: this private member represents the selling price of this car Constructor: 1. public Car(int year, string manufacturer, string model, double price, bool isDrivable = true): this is the constructor of this class. It takes five arguments and assigns them to the appropriate fields. You will assume that all the arguments will be sane (i.e. the values will not break your program). Apology: UML and some newer languages specify the type after the identifier. C# on the other hand requires that you specify the type and then the identifier

Sure, here is the completed code: ... The constructor takes in the necessary arguments to initialize the object, and the PrintInfo method prints out the information about the car object.

In the 3D people counting demo, the detection layer is responsible for sensing multiple reflections from the 3D environment around the sensor and delivering a rich set of measurement vectors, known as the point cloud, representing the real-life targets in the scene. The complex analog-to-digital converter (ADC) data (i.e., the beat signal) from the sensor front-end is the input of the detection layer. Each measurement vector generated by the detection layer represents a reflection point with range, azimuth, elevation, radial velocity (i.e., Doppler), and signal-to-noise ratio (SNR), as discussed in the following sections. A tracking layer [2][3] then processes the point cloud to localize and track the detected targets in the scene. A classification layer (which is not part of the existing 3D people counting demo) can further classify the detected targets to create a complete processing chain to be visualized.翻译一下

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详细举例This code represents a class named "PropertyManagementCompany" which manages a portfolio of real estate properties. The class has a name, liquidity and a set of properties that it manages. The liquidity represents the amount of money the company has available to purchase new properties or sell existing ones. The class has two constructors, one that creates an empty portfolio and sets the liquidity to zero, and another that takes a list of properties and adds them to the portfolio. Both constructors also require the company name and liquidity as parameters. The class has two methods to buy and sell real estate properties. The "buyProperty" method takes a property and a purchase price as parameters and adds the property to the portfolio if the company has enough liquidity to buy it. The "sellProperty" method takes a property and removes it from the portfolio while adding the property's current valuation to the company's liquidity. The class also has getters for the name, liquidity, and portfolio. The "checkName" method is a private helper method that checks if the company name is empty and throws an exception if it is. Overall, this code uses encapsulation to hide the implementation details of the PropertyManagementCompany class. The class has private fields that can only be accessed through its public methods. This approach makes the code more modular and easier to maintain.

python class ...This would add the new property to the portfolio and remove the first property from the portfolio while adding its current valuation to the company's liquidity.

Please write a simply code in python, the requirement is as followed: The Tower of Hanoi is a mathematical game or puzzle. It consists of three rods, and a number of disks of different sizes which can slide onto any rod. The puzzle starts with the disks in a neat stack in ascending order of size on one rod, the smallest at the top, thus making a conical shape. The following figure shows the initial state of the Tower of Hanoi with 5 disks.The objective of the puzzle is to move the entire stack to another rod, obeying the following simple rules: 1. Only one disk can be moved at a time. 2. Each move consists of taking the upper disk from one of the stacks and placing it on top of another stack i.e. a disk can only be moved if it is the uppermost disk on a stack. 3. No disk may be placed on top of a smaller disk. Assume that initially all the disks are placed on rod A. Write a non-recursive Python function to print out the steps to move all the disks from rod A to rod C via rod B (Hint: a recursive algorithm can be converted into a non-recursive algorithm using stack). The header of the function is: def HanoiTower(n) Here n represents the number of disks. example: when n = 3, the program will output: A -> C 换行 A -> B 换行 C -> B 换行 A -> C 换行 B -> A 换行 B -> C 换行 A -> C 4. simple enough for freshman of university can understand

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The human visual cortex is biased towards shape components while CNNs produce texture biased features. This fact may explain why the performance of CNN significantly degrades with low-labeled input data scenarios. In this paper, we propose a frequency re-calibration U-Net (FRCU-Net) for medical image segmentation. Representing an object in terms of frequency may reduce the effect of texture bias, resulting in better generalization for a low data regime. To do so, we apply the Laplacian pyramid in the bottleneck layer of the U-shaped structure. The Laplacian pyramid represents the object proposal in different frequency domains, where the high frequencies are responsible for the texture information and lower frequencies might be related to the shape. Adaptively re-calibrating these frequency representations can produce a more discriminative representation for describing the object of interest. To this end, we first propose to use a channel-wise attention mechanism to capture the relationship between the channels of a set of feature maps in one layer of the frequency pyramid. Second, the extracted features of each level of the pyramid are then combined through a non-linear function based on their impact on the final segmentation output. The proposed FRCU-Net is evaluated on five datasets ISIC 2017, ISIC 2018, the PH2, lung segmentation, and SegPC 2021 challenge datasets and compared to existing alternatives, achieving state-of-the-art results.请详细介绍这段话中的技术点和实现方式

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用到以下类实现The division of responsibility between the different classes is as follows. - Die: Responsible for handling randomly generated integer values between 1 and 6. - DiceCup: Handles five objects (dice) of class Die. Has the ability to bank and release dice individually. Can also roll dice that are not banked. - ShipOfFoolsGame: Responsible for the game logic and has the ability to play a round of the game resulting in a score. Also has a property that tells what accumulated score results in a winning state, for example 21. - Player: Responsible for the score of the individual player. Has the ability, given a game logic, play a round of a game. The gained score is accumulated in the attribute score. - PlayRoom: Responsible for handling a number of players and a game. Every round the room lets each player play, and afterwards check if any player has reached the winning score. 3. Implementation

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Please write a simply code in python, the requirement is as followed: 1. use the list type describe rod A, B and C 2. to The Tower of Hanoi is a mathematical game or puzzle. It consists of three rods, and a number of disks of different sizes which can slide onto any rod. The puzzle starts with the disks in a neat stack in ascending order of size on one rod, the smallest at the top, thus making a conical shape. The following figure shows the initial state of the Tower of Hanoi with 5 disks.The objective of the puzzle is to move the entire stack to another rod, obeying the following simple rules: 1. Only one disk can be moved at a time. 2. Each move consists of taking the upper disk from one of the stacks and placing it on top of another stack i.e. a disk can only be moved if it is the uppermost disk on a stack. 3. No disk may be placed on top of a smaller disk. Assume that initially all the disks are placed on rod A. Write a non-recursive Python function to print out the steps to move all the disks from rod A to rod C via rod B (Hint: a recursive algorithm can be converted into a non-recursive algorithm using stack). The header of the function is: def HanoiTower(n) Here n represents the number of disks.

首先，我们可以使用 Python 的列表类型来描述棒 A，B 和 C： rod_A = [] rod_B = [] rod_C = [] 然后，我们可以定义一个非递归的 Python 函数来打印汉诺塔的移动步骤： def HanoiTower(n): stack = ...

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continue to use Java language, Add a class Borrower that extends User. The constructor of the Borrower class takes a name and a number of books borrowed by the borrower. If the number of books given as argument is strictly less than zero, then the constructor must throw a NotALenderException with the message “A new borrower cannot lend books.”. The borrower class does not have any instance variable. The moreBook method of the Borrower class increases the number of books borrowed by the borrower by the number of books given as argument to the method (so the books borrowed by the borrower becomes more positive!) For example, if a borrower currently borrows 10 books and moreBook(2) is called then the borrower borrows 12 books. It is fine for the moreBook method to be given a negative value as argument, which means the borrower then just returned some books. For example, if a borrower currently borrows 10 books and moreBook(-2) is called then the borrower borrows 8 books. However, a borrower cannot lend books, so the number of books borrowed by the borrower must always be positive or zero, never negative. If the argument given to the moreBook method is too negative and would change the book variable into a negative value, then the number of books borrowed by the borrower must not change and the moreBook method must throw a NotALenderException with the message “A borrower cannot lend XXX book(s).”, where XXX is replaced with the result of -(book + number). For example, if a borrower currently borrows 10 books and moreBook(-12) is called then the borrower still borrows 10 books and the method throws a NotALenderException with the message “A borrower cannot lend 2 book(s).”. Note: to simplify the project, do not worry about the setBook method. Change other classes and interfaces as necessary

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What type of inheritance has the following syntax? Syntax class A { // body of the class A. } class B : access-specifier A { // body of class B. } class C : access-specifier A { // body of class C. } a. Multilevel Inheritance b. Multiple Inheritance c. Hierarchical Inheritance d. Hybrid Inheritance

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1.Discuss how and why the SecurityManager class for JVM check methods can be defined differently based on context.. 2.The library class Collections contains a method sort with the following type signature. public static <T> void sort (T[] a, Comparator <? super T> c); The Comparator interface contains the following method which returns a negative integer, zero or a positive integer according to whether o1 is considered to be before, equal to or after o2 in a proposed ordering. int compare (T o1, T o2) ; What does the identifier T mean in the declaration of the method sort? Illustrate your answer with an example. 3.What does the notation <? super T> mean in the declaration of sort? Again, illustrate your answer with an example. 4.Explain the concept of an anonymous inner class in Java using a method call example. 5.Convert the method call example using an anonymous inner class to a lambda expression. Give the code required for this. 6.In what types of situations might you prefer to use an anonymous class instead of a lambda expression, and vice versa? 7.Explain (auto)boxing and (auto)unboxing in Java? 8.What does the annotation @Override mean in Java? What are the benefits of adding it? 9.What are wildcards in Java and how are they used in generic programming? 10.Can you explain the bounded wildcards, and provide an example

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解释以下这段话The squared data matrix contains all the vectorized shifts of a single-channel feature map . y is the vectorized image of a 2D Gaussian function , which represents the similarity between the shifted sample and the target. is the labels of the background samples. is the learned correlation filter. , τ and are constant coefficients.

这段话主要是在描述一个用于目标跟踪的算法中的相关矩阵和变量的含义。 首先，"squared data matrix"指的是一个矩阵，其中包含了单通道特征图所有的向量化的移位。这个矩阵的大小通常是 $m \times n$，其中 $m$ 是...
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