The following is a class definition for a simple Ebook. Two instance variables and one parameterless constructor are provided. Part 1: Write a second constructor that takes a String array of pages as input and sets the String array instance variable equal to the input. Continue to default the current page number to zero. Part 2: Write a getter and a setter method for the page number variable. The setter should check to make sure that the input is a valid page number and only update the variable if the new value is valid. Part 3: Write a getCurrentPage method that returns the String of the current page indexed by current_page. public class Ebook { private String[] pages; private int current_page; //constructor public Ebook() { this.pages = {"See Spot.", "See Spot run.", "Run, Spot, run."}; this.current_page = 0; } }

Task 1:The first task is to make the maze. A class is created called Maze, in which a 2D array for the maze is declared. Your job is to implement the constructor according to the given javaDoc. When you completed this task, write a set of Junit test case to test your code.As you probably noticed, the maze is defined as a private variable. The second job for you is to write an accessor(getter) method that returns the maze. Other information about what is expected for this method is given in the starter code. public class PE1 { MazedogMaze; /** * This method sets up the maze using the given input argument * @param maze is a maze that is used to construct the dogMaze */ publicvoidsetup(String[][]maze){ /* insert your code here to create the dogMaze * using the input argument. */ }

Create a class called Student that models a student at Carleton University. A student's state consists of a name (String), id number (int) and a list of grades (array of double). Your class must have a constructor that has three input parameters (name, id and grade list) and sets the initial state for the object. Include a toString() method that returns a useful string representation of a student object. The string representation should contain the student's name, ID number, and the number of grades they have recorded (so NOT include all the grades). Include a gradesInRange(double lower, double upper) method that returns the number of grades that this student has that are in the range [lower,upper]. That is, the it returns the number of grades that are greater than or equal to lower and less than or equal to upper. Example Usage: double[] grades {81.2, 93.2, 76,2, 84.6, 63.11, 79.8}; Student s new Student("cat", 100123987, grades); s.gradesInRange (80,100); int num_grades_A // assert...

Create a class called Planet. A planet's state is it's name and a list (array) of moons that it has. You can assume there is a Moon class that a single constructor that takes it's name as input (a String). Add three constructors to your Planet class: Planet(String planetName) (planet has no moons)Planet(String planetName, String moonName) (planet has one moon)Planet(String planetName, Moon[] moons) (planet has arbitrary number of moons). Be sure to use constructor chaining. Question: When creating a planet object, what is the minimum number of constructors that are called (in total, either explicitly by you or by the JVM)? What is the maximum number of constructors that might be called (in total, either explicitly by you or by the JVM)? Give an example for each.

An object of the class Timer is used to indicate when a certain amount of time (in seconds) has elapsed, after which it provides a "DING". The required data field is remainingTime which is the number of seconds until the "DING". When a Timer object is constructed, it is set with the desired number of seconds. When the timer "ticks", it is one second closer to the "DING". This is represented with the tick) method. The dingChecko method indicates whether the timer should be "DINGING". Provide the code for the constructor method, and the methods getRemainingTime), tick(), and dingCheck). public class Timer // Methods // Data private int KeuainingTinei }

javaaa Write a class with a constructor that accepts a String object as its argument. The class should have a method that returns the number of vowels in the string, and another method that returns the number of consonants in the string. Demonstrate the class in a program by invoking the methods that return the number of vowels and consonants. Print the counts returned. Imagine you are developing a software package for an online shopping site that requires users to enter their own passwords. Your software requires that users’ passwords meet the following criteria: The password should be at least six characters long. The password should contain at least one uppercase and at least one lowercase letter. The password should have at least one digit. Write a program that asks the user to enter a password, then displays a message indicating whether it is valid or not.

Rules: Corner cases. By convention, the row and column indices are integers between 0 and n − 1, where (0, 0) is the upper-left site. Throw an IllegalArgumentException if any argument to open(), isOpen(), or isFull() is outside its prescribed range. Throw an IllegalArgumentException in the constructor if n ≤ 0. Unit testing. Your main() method must call each public constructor and method directly and help verify that they work as prescribed (e.g., by printing results to standard output). Performance requirements. The constructor must take Θ(n^2) time; all instance methods must take Θ(1)Θ(1) time plus Θ(1)Θ(1) calls to union() and find().

The goal of this coding exercise is to create two classes BookstoreBook and LibraryBook. Both classes have these attributes: author: Stringtiltle: Stringisbn : String- The BookstoreBook has an additional data member to store the price of the book, and whether the book is on sale or not. If a bookstore book is on sale, we need to add the reduction percentage (like 20% off...etc). For a LibraryBook, we add the call number (that tells you where the book is in the library) as a string. The call number is automatically generated by the following procedure:The call number is a string with the format xx.yyy.c, where xx is the floor number that is randomly assigned (our library has 99 floors), yyy are the first three letters of the author’s name (we assume that all names are at least three letters long), and c is the last character of the isbn.- In each of the classes, add the setters, the getters, at least three constructors (of your choosing) and override the toString method (see samplerun...

Fibonacci A fibonacci sequence is a series of numbers in which each number is the sum of the two preceding numbers. For example: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, and so on... For this, you will implement a class that takes a positive integer (n) and returns the number in the nth position in the sequence. Examples When n is 1, the returned value will be 0. When n is 4, the returned value will be 2. When n is 9, the returned value will be 21. come up with the formula and base cases Implementation Create a class Fibonacci with a public static method getValue. Create a Main class to test and run your Fibonacci class.

Matlab code please Question 1. Plot the following three functions. The x range is from -2π to 2π, use an increment of π/20. Add labels to the x and y axes, a title, and a grid for each part, a-c. Please paste in both your code and your plots for each part. [For help, watch this video: https://youtu.be/9GhUXhAOja4 ] s_1 (x)= cos(x) s_2 (x)=2cos(2x) s_3 (x)=3cos(3x) Plot all 3 functions in the same plot. Use different colors and different line styles to distinguish the curves. Add a legend. Plot them in three separate plots. All plots should be in the same row. Plot them in three separate plots. All plots should be in the same column.

The zoo will have several animals, and each animal will have a name, age, and species. Moreover, each animal will have a method make_sound(), which should return a string representing the sound it makes. Perform the following steps: Create a Zoo class. This class should be able to store multiple animals. It should have methods to add_animal and remove_animal. Also, add a method get_animals that prints a list of all animals currently in the zoo, including their name, age, and species. Create an Animal parent class. This class should have attributes for name, age, and species. Include a make_sound() method that returns a string representing the sound the animal makes. Create two or more child classes that inherit from Animal (for example, Lion and Elephant - you get to choose the animal types). These child classes should override the make_sound() method to return a sound specific to the animal they represent. Your program should be interactive. It should provide a menu to the user that...

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Create a Point classCreate a Point class as we did in the class. We'll use this to create Point objects that hold x,y coordinates of locations where we'll want to draw. Draw DotsWrite a drawDots(points) function that takes a list points as input and draws a dot on the drawing window for each Point. For example, you should be able to call your function as follows: >>> p = Point(10, 20) >>> q = Point(20, 30) >>> points = [p, q] >>> drawDots(points)