tion". Use the appropriate LinkedList type. You

You have to use comment function to describe what each line does    import java.io.BufferedReader; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.IOException; import java.util.ArrayList; import java.util.Arrays; import java.util.List;   public class PreferenceData {   private final List<Student> students; private final List<Project> projects; private int[][] preferences;   private static enum ReadState { STUDENT_MODE, PROJECT_MODE, PREFERENCE_MODE, UNKNOWN; };   public PreferenceData() { super(); this.students = new ArrayList<Student>(); this.projects = new ArrayList<Project>(); }   public void addStudent(Student s) { this.students.add(s); }   public void addStudent(String s) { this.addStudent(Student.createStudent(s)); }   public void addProject(Project p) { this.projects.add(p); }   public void addProject(String p) { this.addProject(Project.createProject(p)); }   public void createPreferenceMatrix() { this.preferences = new…

Use Java pl DataFileWords.txt: lovegentlensslovepeacelovekindnesslovepeaceunderstandingkindnessjoypeaceunderstandingfriendshipgentlenssgoodnesslovepeacegoodnesslovegentlensscontrolunderstandingunderstandinggentlensslovepeacepatiencecontrolkindnessgentlensslovepeacejoygoodnesspeacefriendshipgoodnesskindnesslovepeacegoodnesscontrolpatiencejoygentlensspatiencegentlensspatiencekindnessgoodnessjoygentlenssgentlenss

package Q2;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.util.ArrayList;import java.util.Scanner;public class Question2 {public static void main(String[] args) throws FileNotFoundException {/*** Part a* Finish creating an ArrayList called NameList that stores the names in the file Names.txt.*/ArrayList<String> NameList;/*** Part b* Replace null on the right-hand-side of the declaration of the FileInputStream object named inputStream* so that it is initialized correctly to the Names.txt file located in the folder specified in the question description*/FileInputStream inputStream = null;Scanner scnr = new Scanner(inputStream); //Do not modify this line of code/*** Part c* Using a loop and the Scanner object provided, read the names from Names.txt* and store them in NameList created in Part a.*//*** Part d* Reorder the names in the ArrayList so that they appear in reverse alphabetical order.*/// System.out.println("NameList after correct ordering: "…

// The language is java, please take a screenshot of your output, and make sure your code is run.

In Java,  Explain when it might be preferable to use a map instead of a set.

in c++ code

for some reason in the list object when i try to insert the code into a linked list it inserts the characters backwards instead of forwards. I have to input characters from a user created string individually into a linked list. the linked list cannot change because the teacher requires me to use the specified code in my textbook. i would appreciate if you would explain the problem and solution in words and not code. the code is in Java is there a way to get this program to output correctly? OUTPUT please enter a string.coppermakerimprintList (first -->last): tnirpmirekamreppoc MAIN FUNCTION import java.util.Scanner;/*** Write a description of class test here.** @author (your name)* @version (a version number or a date)*/public class test{// instance variables - replace the example below with your ownpublic static void main(String[] args){Scanner input = new Scanner(System.in);linkedList list = new linkedList();char character;System.out.println("please enter a string.");String…