Answered: Define and invoke the constructor for a…

Engineering

Computer Science

Define and invoke the constructor for a HashSet variable named colorscapable of holding strings.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Similar questions

Java Code: Build the two variable classes that we need: InterpreterDataType and a subclass InterpreterArrayDataType. I will abbreviate these as IDT and IADT. IDT holds a string and has two constructors - one with and one without an initial value supplied. IADT holds a HashMap<String,IDT>. Its constructor should create that hash map. We will use these as our variable storage classes as the interpreter runs. Let's start the interpreter itself. Create a new class (Interpreter). Inside of it, we will have an inner class - LineManager. We will also need a HashMap<String,IDT> that will hold our global variables. We will also have a member HashMap<String, FunctionDefinitionNode> - this will be our source when someone calls a function. The LineManager should take a List<String> as a parameter to the constructor and store it in a member. This will be our read-in input file. It will need a method : SplitAndAssign. This method will get the next line and split it by looking…
Write a generic class Students.java which has a constructor that takes three parameters – id, name, and type. Type will represent if the student is ‘remote’ or ‘in-person’. A toString() method in this class will display these details for any student. A generic method score() will be part of this class and it will be implemented by inherited classes. Write accessors and mutators for all data points. Write two classes RemoteStudents.java and InPersonStudents.java that inherits from Student class. Show the use of constructor from parent class (mind you, RemoteStudents have one additional parameter – discussion). Implement the abstract method score() of the parent class to calculate the weighted score for both types of students. Write a driver class JavaProgramming.java which has the main method. Create one remote student object and one in-person student object. The output should show prompts to enter individual scores – midterm, finals, ...... etc. and the program will…
only Voicemail.java files can have input added inbetween lines 4 and 7. not in the gery code sections.
for (String name : likedBy) { String likedUser= name.trim(); Set<String> likes = likesMap.getOrDefault(likedUser, new HashSet<>()); Here you create a new Set for likes. This is in the iteration over the likers though so it results in many missing entries. [ How do i Fix this ] import java.io.BufferedReader; import java.io.FileReader; import java.io.IOException; import java.util.ArrayList; import java.util.HashMap; import java.util.HashSet; import java.util.List; import java.util.Map; import java.util.Set; public class FacebookLikeManager { private Map<String, Set<String>> likesMap; public FacebookLikeManager() { likesMap = new HashMap<>(); } public void buildMap(String filePath) { try (BufferedReader reader = new BufferedReader(new FileReader(filePath))) { String line = reader.readLine(); while (line != null) { String[]…
There is an error for type in ProgramNode.java. Please fix the error and show the fixed code for ProgramNode.java with the screenshot of the working code.
You will also have to write Student Tests that test the following in the provided file.i. Adding element(s).ii. Get elements at index – (1) with a valid index and (2) with an invalid indexiii. Test equality of two StringArrayLists (of size 0, 2)iv. Test if a StringArrayList contains a String (test both true and false cases)v.Test removing a String from a StringArrayList.
Given that an ArrayList of Strings named friendList has already been created and names have already been inserted, write the statement necessary to change the name "Tyler", stored at index 8, to "Bud". This is needed in Java
i need help with this
In Java, Create Movie class, which has private fields for title, director, rating. It has a constructor to initialize these fields and a toString method for printing movie details. There is also a getRating method to retrieve the movie rating. Create Rating Comparator class which implements the Comparator interface for comparing movies based on their ratings. Create DemoMovies Class. Initialize necessary data structures like LinkedList, TreeMap for rating as key and Movie from Movie class as value, TreeSet, and ProtiyQueue. Use a loop to take user input for movie detailsuntil the user enters 'WWW' as the movie title.Inside the loop, for each movie, create a Movie object, add it to various data structures that is title, director and rating based on the constructor. Add the Movie object to the LinkedList. Add the rating and the object to the TreeMap.Add the rating to the TreeSet.Add the Movie object to the Priority Queue.Display the entered movies. Sort and display Movies by rate by…
I'm trying to understand LargeIntList classes for lists, I was wondering these statements or True or False? either or, can you please explain your answers? If you need more info, I can provide an image of the textbook I am refering LargeIntList to, it is chapter 6, section 6. Thank you. Supports addition of elements at the front of the list, the end of the list, and anywhere in between. Can hold objects of any Java class. Has only O(1) operations, including its constructor. Provides more than one Iterator.
7- question What keys and values are contained in the following map after execution of the following piece of code? Map map = new HashMap (); map.put (8, "Eight"); map.put (41, "Forty-one"); map.put (8, "Ocho"); map.put (18, "Eighteen"); map.put (50, "Fifty"); map.put (132, "OneThreeTwo"); map.put (28, "Twenty-eight"); map.put (79, "Seventy-nine"); map.remove ( 41); map.remove (28); map.put (28, "18"); map.remove (18); a. {8=Eight, 41=Forty-one, 8=0cho, 18=Eighteen, 50=Fifty, 132=OneThreeTwo, 28=Twenty-eight, 79=Seventy-nine, 28=18} b. {8=Eight, 8=Ocho, 50=Fifty, 132=OneThreeTwo, 79=Seventy-nine, 28=18} c. {50=Fifty, 132=DOneThreeTwo, 8=Ocho, 28=18, 79=Seventy-nine} d. {8=Eight, 50=Fifty, 132=OneThreeTwo, 79=Seventy-nine, 28=18}
⦁ Write a method called subMap that accepts two maps from strings to strings as its parameters and returns true if every key in the first map is also contained in the second map and maps to the same value in the second map. For example, {Smith=949–0504, Marty=206–9024} is a submap of {Marty=206–9024, Hawking=123–4567, Smith=949–0504, Newton=123–4567}. The empty map is a submap of every map.