Distinguish between the Java classes GenericServlet and HttpServlet using an example.
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- Given the code: import java.util.HashMap; import java.util.LinkedList; import java.util.Scanner; public class Controller { privateHashMap<String,LinkedList<Stock>>stockMap; publicController(){ stockMap=newHashMap<>(); Scannerinput=newScanner(System.in); do{ // Prompt for stock name or option to quit System.out.print("Enter stock name or 3 to quit: "); StringstockName=input.next(); if(stockName.equals("3")){ break;// Exit if user inputs '3' } // Get or create a list for the specified stock LinkedList<Stock>stockList=stockMap.computeIfAbsent(stockName,k->newLinkedList<>()); // Prompt to buy or sell System.out.print("Input 1 to buy, 2 to sell: "); intcontrolNum=input.nextInt(); System.out.print("How many stocks: "); intquantity=input.nextInt(); if(controlNum==1){ // Buying stocks System.out.print("At what price: "); doubleprice=input.nextDouble(); buyStock(stockList,stockName,quantity,price); }else{ // Selling stocks System.out.print("Press…Implement a generic priority queue in Java and test it with an abstract Cryptid class and two concrete Cryptid classes, Yeti and Bigfoot. Create a code package called pq and put all the code for this assignment in it. Write the abstract class Cryptid. A Cryptid has a name (a String) and a public abstract void attack() method. Name should be protected. The class implements Comparable<Cryptid>. The compareTo method returns a negative int if the instance Cryptid's name (that is, the name of the Cryptid you called the method on) is earlier in lexicographic order than the name of the other Cryptid (the one passed in as an argument; it returns a positive int if the other Cryptid's name is earlier in lex order, and returns 0 if they are equal (that is, if they have all the same characters.) This part is easy; just have the method call String's compareTo() method on the instance Cryptid's name, with the other Cryptid's name as the argument, and return the result. Extend Cryptid…write a program to implement the above interface using Lambda Expression to accept “ Hello World” and print it 10 times. write a program to implement the above interface using Inner Class to accept “ Hello World” and print it 10 times This is my code interface interf1 { publicvoidrepeat(Strings1); } public class Main { public static void main(String[] args) { interf1 obj = (s1)-> { //using lambda expression for(int i=0;i<10;i++) { System.out.println(s1); } }; obj.repeat("Hello World"); } } public class Assignment { public static void main(String[] args) { interf1 obj = new interf1() { //inner class public void repeat(String s1){ for(int i=0;i<10;i++){ System.out.println(s1); } } }; obj.repeat("Hello World"); //function call } } But i keep getting this error Exception in thread "main" java.lang.NoClassDefFoundError:…
- Write new Java class called Catalog so that it contains an ArrayList of Article objects.Implement comparator interface so that the catalog can be sorted by name or by volume.Given the following code in Java and attached images( containing related code): //Controller (ONLY EDIT THE Controller.java file) import java.util.LinkedList; import java.util.Scanner; public class Controller { public Controller() { LinkedList<Stock> googList = new LinkedList<Stock>(); LinkedList<Stock> amazList = new LinkedList<Stock>(); Scanner input = new Scanner(System.in); do { System.out.print("Enter 1 for Google stock or 2 for Amazon, 3 to quit: "); int stockSelect = input.nextInt(); if(stockSelect == 3) break; System.out.print("Input 1 to buy, 2 to sell: "); int controlNum = input.nextInt(); System.out.print("How many stocks: "); int quantity = input.nextInt(); if(controlNum == 1) { System.out.print("At what price: "); double price =…I'm trying to create a test harness for my LinkedList. I provided the code below. LinkedListImpl.java package linkedList; public abstract class LinkedListImpl implements LinkedList { private ListItem firstItem; public LinkedListImpl() { this.firstItem = null; } @Override public Boolean isItemInList(String thisItem) { ListItem currentItem = firstItem; while (currentItem != null) { if (currentItem.data.equals(thisItem)) { return true; } currentItem = currentItem.next; } return false; } @Override public Boolean addItem(String thisItem) { if (isItemInList(thisItem)) { return false; } else { ListItem newItem = new ListItem(thisItem); if (firstItem == null) { firstItem = newItem; } else { ListItem currentItem = firstItem; while (currentItem.next != null) { currentItem = currentItem.next; } currentItem.next = newItem; } return true; } } @Override public Integer itemCount() { Integer count = 0; ListItem currentItem = firstItem; while (currentItem != null) { count++; currentItem =…
- Use java Implement a phone book using a linked list structure. In this phone book , you are going to store a name,lastname,email,and phone number Implement the folowing methods by using this class public class PhoneBookSinglyLinkedList { public PhoneBookNode head; public PhoneBookNode tail; public int size; public boolean isEmpty() {//todo implement this} public int size() {//todo implement this} public void printPhoneBook() {//todo implement this} public void add(Contact contact) {//todo implement this} public PhoneBookNode findByFirstName(String firstName) {//todo implement this} public List findAllByLastName(String lastName) {//todo implement this} public void deleteByFirstName(String firstName) {//todo implement this} public void deleteAllMatchingLastName(String lastName) {//todo implement this} public List findAll() {//todo implement this}import java.util.HashSet; import java.util.Set; // Define a class named LinearSearchSet public class LinearSearchSet { // Define a method named linearSearch that takes in a Set and an integer target // as parameters public static boolean linearSearch(Set<Integer> set, int target) { // Iterate over all elements in the Set for () { // Check if the current value is equal to the target if () { // If so, return true } } // If the target was not found, return false } // Define the main method public static void main(String[] args) { // Create a HashSet of integers and populate integer values Set<Integer> numbers = new HashSet<>(); // Define the target to search for numbers.add(3); numbers.add(6); numbers.add(2); numbers.add(9); numbers.add(11); // Call the linearSearch method with the set…import java.util.HashMap; import java.util.Map; public class LinearSearchMap { // Define a method that takes in a map and a target value as parameters public static boolean linearSearch(Map<String, Integer> map, int target) { // Iterate through each entry in the map for () { // Check if the value of the current entry is equal to the target if () { // If the value is equal to the target, return true } } // If no entry with the target value is found, return false } public static void main(String[] args) { // Create a HashMap of strings and integers Map<String, Integer> numbers = new HashMap<>(); // Populate the HashMap with key-value pairs numbers.put("One", 1); numbers.put("Two", 2); numbers.put("Three", 3); numbers.put("Four", 4); numbers.put("Five", 5); // Set the target value to search for…
- The Java classes GenericServlet and HttpServlet may be differentiated from one another with the assistance of an example.in java please.Create a method from the implementation perspective. Create a method where it takes in a linked chain of values and adds them in order to the front. method header:public void addToFront(ANode<T> first)BuiltInFunctionDefinitionNode.java has an error so make sure to fix it. BuiltInFunctionDefinitionNode.java import java.util.HashMap; import java.util.function.Function; public class BuiltInFunctionDefinitionNode extends FunctionDefinitionNode { private Function<HashMap<String, InterpreterDataType>, String> execute; private boolean isVariadic; public BuiltInFunctionDefinitionNode(Function<HashMap<String, InterpreterDataType>, String> execute, boolean isVariadic) { this.execute = execute; this.isVariadic = isVariadic; } public String execute(HashMap<String, InterpreterDataType> parameters) { return this.execute.apply(parameters); } }
