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- import java.util.Scanner; public class LabProgram { public static Roster getInput(){ /* Reads course title, creates a roster object with the input title. Note that */ /* the course title might have spaces as in "COP 3804" (i.e. use nextLine) */ /* reads input student information one by one, creates a student object */ /* with each input student and adds the student object to the roster object */ /* the input is formatted as in the sample input and is terminated with a "q" */ /* returns the created roster */ /* Type your code here */ } public static void main(String[] args) { Roster course = getInput(); course.display(); course.dislayScores(); }} public class Student { String id; int score; public Student(String id, int score) { /* Student Employee */ /* Type your code here */ } public String getID() { /* returns student's id */…The block is practically a square-size placeholder for the Tile objects. But not all the spots are necessarily occupied. When the block is generated, we randomly pick the spots that will be filled in with tiles. All the tiles of a block must have the same color. write the code for these functions below private DynamicArray<DynamicArray<Tile>> block; // the internal storage of the block data public Block(int y, int x, int size) // this contructor creates a 2D placeholder of null value; //these values will be populated later with calls to setTile() public Block(int y, int x, int size, byte color) // overloaded constuctor that creates a 2D matrix with actual tile objects; //no need to call setTile afterwardsplease answer correctly!! Function Growth package functiongrowth; import java.util.Scanner; public class FunctionGrowth { private long start = 0; public FunctionGrowth() { start = System.currentTimeMillis(); } public double elapsedTime() { long now = System.currentTimeMillis(); return (now - start) / 1000.0; } private static long constant_value(long paramInt) { long l = 0L; for (int i = 0; i < paramInt; i++) l += 1L; return l; } private static long logarithmic(long paramInt1, long paramInt2) { long l = 0L; for (int i = 1; i + i <= paramInt1; i += i) l += constant_value(paramInt2); return l; } private static long sqrt(long paramInt1, long paramInt2) { long l = 0L; int i = 0; for (int j = 0; j < paramInt1; i++) { l += constant_value(paramInt2);j += i; } return l; } public static long linearithmic(long paramInt1, long paramInt2) { if…
- Java - Encapsulation Create a class Point with attributes x and y which are both integers. Create getters and setters for these attributes and implement the following methods: 1. calculateDistance() - calculates the distance from the origin to the point. Returns a double, formula is sqrt(x^2 + y^2) 2. printCoordinates() - prints "(x,y)" Ask for user inputs for x and y. Use the methods printCoordinates() and calculateDistance() respectively. Inputs 1. X 2. Y Sample Output Enter x: 20 Enter y: 15 (20,15) 25.00In Java: -Using a BST Interface (Binary Search Tree) -Create a class Disk. Disk contains four fields: model (String), size (int), measure (String, for GB or TB), and performance index (int). -Disk needs a constructor to initialize all fields, a toString method, and an equals. Make the class Comparable and write a compareTo method that compares Disks based on the size of the disk. Make sure your comparison accounts for the fact that some numbers are in GB and some are in TB. Write a method that will return true if the disk is the same size as the parms; parms are the size and measure("GB" or "TB"). Also write a method to create a Comparator which compares Disks based on the performance rating. -The client code should do the following: Write a function called build, which will open the disks.txt file, read in each disk and add it to the BST. For each disk the model is on the first line, and the second line contains the size, measure, and performance index. The BST is passed to build as…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) {…
- please update generateRandoms, letterToGrades, sumBetween, countCharacters //A6Utilities.java import java.io.IOException;import java.nio.file.Files;import java.nio.file.Paths;import java.security.SecureRandom;import java.util.List;import java.util.TreeMap;import java.util.function.Function;import java.util.stream.Collectors;public class A6Utilities {/*** Returns the corresponding letter grade. Don't modify this method, simply use it when converting single* grades to their equivalent letter grade** @param grade the integer grade to convert* @return the letter grade equivalent to the integer grade*/private static char letterGrade(final int grade) {if (grade < 0) return '?';else if (grade < 60) return 'F';else if (grade < 70) return 'D';else if (grade < 80) return 'C';else if (grade < 90) return 'B';else if (grade <= 100) return 'A';else return '?';}/*** The method uses Java Streams only. Don't use any looping structures, conditional statements are OK (IF, TERNARY,…import java.util.Scanner; public class ContactList { public static void main(String[] args) { Scanner scnr = new Scanner(System.in); ContactNode head = null; ContactNode current = null; // Read the name and phone number for three contacts and build a linked list. for (int i = 1; i <= 3; i++) { System.out.print(" " + i + ": "); String name = scnr.next(); System.out.print(" " + i + ": "); String phoneNumber = scnr.next(); ContactNode newContact = new ContactNode(name, phoneNumber); if (head == null) { head = newContact; current = head; } else { current.insertAfter(newContact); current = newContact; } } // Output each contact. current = head; for (int i = 1; current != null; i++) { System.out.print("Person " + i + ": "); current.printContactNode();…Question 2. package sortsearchassigncodeex1; import java.util.Scanner; import java.io.*; // // public class Sortsearchassigncodeex1 { // public static void fillArray(Scanner inputFile, int[] arrIn){ int indx = 0; //Complete code { arrIn[indx] = inputFile.nextInt(); indx++; } }
- EDIT PAYMENTDAO.JAVA FILES SO IT PASSES TEST FROM CREDITCARDTEST.JAVA (CreditCardTest.java) package server; import com.google.gson.Gson; import dao.PaymentDao; import dto.BasePaymentDto; import dto.CreditCardPayment; import java.util.List; import org.testng.Assert; import org.testng.annotations.Test; public class CreditCardTest { private static final Gson gson = new Gson(); @Test public void makeCreditCardPayment(){ double value = Math.random(); String number = String.valueOf(Math.random()); String securityCode = String.valueOf(Math.random()); CreditCardPayment payment = new CreditCardPayment(value, number, securityCode); String test1 = "POST /makeCreditCardPayment HTTP/1.1\n" + "Host: test\n" + "Accept-Language: en-us\n" + "Accept-Encoding: gzip, deflate\n" + "Connection: Keep-Alive\n" + "\n" + gson.toJson(payment); String response = Server.processRequest(test1); Assert.assertEquals(response,…Can you please help update this? //A6Utilities.java import java.io.IOException;import java.nio.file.Files;import java.nio.file.Paths;import java.security.SecureRandom;import java.util.List;import java.util.TreeMap;import java.util.function.Function;import java.util.stream.Collectors;public class A6Utilities {/*** Returns the corresponding letter grade. Don't modify this method, simply use it when converting single* grades to their equivalent letter grade** @param grade the integer grade to convert* @return the letter grade equivalent to the integer grade*/private static char letterGrade(final int grade) {if (grade < 0) return '?';else if (grade < 60) return 'F';else if (grade < 70) return 'D';else if (grade < 80) return 'C';else if (grade < 90) return 'B';else if (grade <= 100) return 'A';else return '?';}/*** The method uses Java Streams only. Don't use any looping structures, conditional statements are OK (IF, TERNARY, SWITCH)* <p>* Generates a list of secure…import java.util.Scanner; public class Inventory { public static void main (String[] args) { Scanner scnr = new Scanner(System.in); InventoryNode headNode; InventoryNode currNode; InventoryNode lastNode; String item; int numberOfItems; int i; // Front of nodes list headNode = new InventoryNode(); lastNode = headNode; int input = scnr.nextInt(); for(i = 0; i < input; i++ ) { item = scnr.next(); numberOfItems = scnr.nextInt(); currNode = new InventoryNode(item, numberOfItems); currNode.insertAtFront(headNode, currNode); lastNode = currNode; } // Print linked list currNode = headNode.getNext(); while (currNode != null) { currNode.printNodeData(); currNode…