For a class they are developing jointly, Sally and Harry construct two separate compareTo methods. Depending on the connection between two objects, Sally's compareTo method returns -1, 0 or +1. The results of Harry's compareTo technique are -6, 0 or +3. Which approach is best?
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For a class they are developing jointly, Sally and Harry construct two separate compareTo methods. Depending on the connection between two objects, Sally's compareTo method returns -1, 0 or +1. The results of Harry's compareTo technique are -6, 0 or +3. Which approach is best?
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- Sally and Harry implement two different compareTo methods for a classthey are working on together. Sally’s compareTo method returns −1, 0, or +1,depending on the relationship between two objects. Harry’s compareTo methodreturns −6, 0, or +3. Which method is suitable?Assume we have a Book class that includes authorInit and pubYear attributes of type Stringand int, respectively, both set by the constructor. Write a compareTo method for this class, so thatbook objects are ordered based on the author’s initials first and then (if needed) the publication year. DO NOT assume the length of String type authorInit to be 2.We have two classes, Person and Employee. Both have a field, firstName. We have instances of these objectsPerson p and Employee e. Both p and e have the same value for firstName, specifically, p.firstName = “joe”and e.firstName = “joe” Which of the following statements is necessarily true? Group of answer choices 1. p.equals(e) will return true because they contain the same firstName. 2. We don’t know if either class will have an equals method. 3. There is not enough information to tell what p.equals(e) will return. 4. p.equals(e) will return false but p == e will be true.
- Answer the given question with a proper explanation and step-by-step solution. USING JAVA: ---Sorting the Invoices via dates--- Another error that will still be showing is that there is not Comparable/compareTo() method setup on the Invoice class file. That is something you need to fix and code. Implement the use of the Comparable interface and add the compareTo() method to the Invoice class. The compareTo() method will take a little work here. We are going to compare via the date of the invoice. The dates of the Invoice class are by default saved in a MM-DD-YYYY format. So they have a dash '-' between each part of the date. So you will need to split the date of the current invoice AND split the date of the object sent to the method. We have three things to compare against here. First we need to check the year. If the years are the same then you should go another step forward and compare the months. If the months are the same then you will lastly have to compare the day. Use whatever…If a class implements the Comparable interface, it is easy to swap in/out different strategies for comparing objects of that class. For example, if our Shapes implement Comparable and provide a compareTo() that compares areas, we can provide another compareTo() override for those shapes that compares perimeter. Group of answer choices True FalseFor this exercise, you are given a Team superclass with a BaseballTeam and FootballTeam subclass. Take a moment to examine these classes and the instance variables and methods in each. In the TeamTester class, you will see three objects declared and instantiated using the Team, FootballTeam, or BaseballTeam classes. For each object, use a print statement to print out any public method that returns information that is available for that particular object, including the toString. For example, the dolphin object is a FootballTeam object. One of the pieces of information that can be printed is the getTies() method, so you will call that method in your TeamTester file: System.out.println(dolphins.getTies()); Do this for all the methods that each of the objects can call. Hint: Remember, for the program to compile and run, Java looks for methods to exist in certain classes. ================================= public class Team { private String name;private String location;private int…
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- Now we are going to use the design pattern for collecting objects. We are going to create two classes, a class AmazonOrder that models Amazon orders and a class Item that models items in Amazon orders. An item has a name and a price, and the name is unique. The Item class has a constructor that takes name and price, in that order. The class also has getters and setters for the instance variables. This is the design pattern for managing properties of objects. The setName() method should do nothing if the parameter is the empty string, and the setPrice() method should do nothing if the parameter is not positive. The class also has a toString() method that returns a string representation for the item in the format “Item[Name:iPad,Price:399.99]”. For simplicity, we assume an Amazon order can have at most 5 items, and class AmazonOrder has two instance variables, an array of Item with a length of 5 and an integer numOfItems to keep track of the number of items in the…Given a Student class, and UndergradCourse is a true subtype of Course, there is one method called recommend in the Student class: public class Student { public Course recommend(Course pCourseID); } Please evaluate if EACH of the method in UndergradStudent class violates the Liskov Substitution Principle. public class UndergradStudent extends Student { 1. public Course recommend(UndergradCourse pCourseID); 2. public UndergradCourse recommend(Course pCourseID); 3. public UndergradCourse recommend(Object pCourseID); 4. public Course recommend(Course pCourseID) throw SomeCheckedException;package1 and package2 are instances of the Box class. Attributes length, width, and height of both package1 and package2 are read from input. Then, scaling_factor1 and scaling_factor2 are read from input. In the Box class, define instance method scale_measurements() with self and one integer as parameters to: Assign attribute length with length's current value multiplied by the integer parameter. Assign attribute width with width's current value multiplied by the integer parameter. Assign attribute height with height's current value multiplied by the integer parameter.