With the help of an example, distinguish between the Java classes GenericServlet and HttpServlet.
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With the help of an example, distinguish between the Java classes GenericServlet and HttpServlet.
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- Complete the following class with the appropriate methods shown in the rubric import java.util.HashMap; import java.util.Set; /** * Stores and manages a map of users. * * @author Java Foundations * @version 4.0 */ public class Users { privateHashMap<String, User> userMap; /** * Creates a user map to track users. */ publicUsers() { userMap = newHashMap<String, User>(); } /** * Adds a new user to the user map. * * @param user the user to add */ publicvoidaddUser(Useruser) { userMap.put(user.getUserId(), user); } /** * Retrieves and returns the specified user. * * @param userId the user id of the target user * @return the target user, or null if not found */ publicUsergetUser(StringuserId) { returnuserMap.get(userId); } /** * Returns a set of all user ids. * * @return a set of all user ids in the map */ publicSet<String> getUserIds() { returnuserMap.keySet(); } }A generic class is defined below. Complete the program as told by the comments. public class Example { private T1 number; private T2 description; I -- define the method setExampleData() to set both variables- public void setExampleData (T1 n, T2 d){ [1] [2] } public static void main( [3] ) { // arguments create an object obj1 by parameters Integer and String- --- [4] -call the setExampleData() method-- [5] } }Suppose you have an object made up of two w-bit integers, x and y. Show why x+y does not make a good hash code for your object. Give an example of a large set of objects that would all have the same hash code. c++ and provide good comments.
- Java Code: Create a Parser class. Much like the Lexer, it has a constructor that accepts a LinkedList of Token and creates a TokenManager that is a private member. The next thing that we will build is a helper method – boolean AcceptSeperators(). One thing that is always tricky in parsing languages is that people can put empty lines anywhere they want in their code. Since the parser expects specific tokens in specific places, it happens frequently that we want to say, “there HAS to be a “;” or a new line, but there can be more than one”. That’s what this function does – it accepts any number of separators (newline or semi-colon) and returns true if it finds at least one. Create a Parse method that returns a ProgramNode. While there are more tokens in the TokenManager, it should loop calling two other methods – ParseFunction() and ParseAction(). If neither one is true, it should throw an exception. bool ParseFunction(ProgramNode) bool ParseAction(ProgramNode) -Creates ProgramNode,…Write a test client TestBinarySearch.java for use in testing the implementations of min(), max(), floor(), ceiling(), select(), rank(),deleteMin(), deleteMax(), and keys() that are given in the text. Start with the standard indexing client . Add code to take additional command-line arguments, as appropriateWrite 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…
- Define the missing method. Use "this' to distinguish the local member from the parameter name. // ===== Code from file CablePlan.java public class CablePlan { private int numDays; // FIXME: Define setNumDays () method, using "this" implicit parameter. public void setNumDays (int numDays) { /* Your solution goes here */ } public int getNumDays () { return numDays; } // ==== end // ===== Code from file CallCablePlan.java import java.util.Scanner; public class CallCablePlan { public static void main (String [] args) { Scanner scnr = new Scanner (System.in); new CablePlan (); CablePlan houselPlan int userNum; scnr.nextInt (); houselPlan.setNumDays (userNum); System.out.println (houselPlan.getNumDays ()); userNum = // ===== end ==== =Java Code: Below is Parser.java and there are errors. getType() and getStart() is undefined for the type Optional<Token> and there is an error in addNode(). Make sure to get rid of all the errors in the code. Attached is images of the errors. Parser.java import java.text.ParseException;import java.util.LinkedList;import java.util.List;import java.util.Optional; import javax.swing.ActionMap; public class Parser { private TokenHandler tokenHandler; private LinkedList<Token> tokens; public Parser(LinkedList<Token> tokens) { this.tokenHandler = new TokenHandler(tokens); this.tokens = tokens; } public boolean AcceptSeparators() { boolean foundSeparator = false; while (tokenHandler.MoreTokens()) { Optional<Token> currentToken = tokenHandler.getCurrentToken(); if (currentToken.getType() == Token.TokenType.NEWLINE || currentToken.getType() == Token.TokenType.SEMICOLON) {…What is generic class give me a one example
- 2. Linked ListsGiven the starter code consisting of ListOfNodes.java and Node.java, complete theimplementation of all the methods in ListOfNodes.java without changing the code in Node.javaor main(). You should start by commenting all the lines in main and gradually implement themethods then run the code after each method comparing the real output to the expected out listedhere. The following are some rules and guidelines you must follow:a. Read all the methods and decide if some of them will call on othersb. Reuse methods whenever possiblec. You are encouraged to write private helper methodsd. You cannot use the LinkedList class provided by the Java Framework The expected output is:[], 0[l], 1[el], 2[Hel], 3[Helo], 4[Hello], 5[ABCDE], 5ABCDE[ABCDE], 5CMPS 210 Quiz 1 Spring 2020/2021[ABCCDE], 6[ACXCDC], 6[AXCDC], 51C[AXCD], 4D[AXC], 3C[AX], 2X[A], 1A[], 0[abcde], 5[badce], 5[$badce], 6[b$daec], 6Describe some data that might be best stored in a Java Collection LinkedList. Briefly explain why this is probably a good choice. Give an example of the LinkedList declaration and instantiation for your example. Show the code to store at least one value into your LinkedList.In Java The base class Pet has protected fields petName, and petAge. The derived class Cat extends the Pet class and includes a private field for catBreed. Complete main() to: create a generic pet and print information using printInfo(). create a Cat pet, use printInfo() to print information, and add a statement to print the cat's breed using the getBreed() method.