te 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.

Implement the Solver class. In doing so, you are allowed to define other classes to help you (as well as use “built-in” Java classes or the book’s classes). The point of the solver class is the solve method which takes a board/puzzle configuration represented as a 2D array of booleans and returns a char array containing a minimal sequence of moves that will lead to the solved board (all the cells around the edges being filled). The board configuration is passed in as a 5-by-5 boolean array of Booleans with exactly 16 true cells (filled) and 9 false cells (empty). The solve method then returns an array of characters representing a minimal sequence of moves that solves the puzzle. In other words, if the characters from the returned array are used in order as input to the move method on the Board object representing the initial configuration, the resulting board configuration represents the solved board. Furthermore, the solution must be minimal in the sense that there are no solutions…

Implement the Solver class. In doing so, you are allowed to define other classes to help you (as well as use “built-in” Java classes or the book’s classes). The point of the solver class is the solve method which takes a board/puzzle configuration represented as a 2D array of booleans and returns a char array containing a minimal sequence of moves that will lead to the solved board (all the cells around the edges being filled). The board configuration is passed in as a 5-by-5 boolean array of Booleans with exactly 16 true cells (filled) and 9 false cells (empty). The solve method then returns an array of characters representing a minimal sequence of moves that solves the puzzle. In other words, if the characters from the returned array are used in order as input to the move method on the Board object representing the initial configuration, the resulting board configuration represents the solved board. Furthermore, the solution must be minimal in the sense that there are no solutions…

Provide a different implementation of ChoiceQuestion. Instead of storing the choices in an array list, the addChoice method should add the choice to the question text. For this purpose, an addLine method has been added to the Question class. /**   A question with multiple choices.*/public class ChoiceQuestion extends Question{   // Add any needed instance variables, but don't store the choices   // The choices should be added to the text of the superclass   /* code goes here */      /**      Constructs a choice question with a given text and no choices.      @param questionText the text of this question   */   public ChoiceQuestion(String questionText)   {      /code goes here */   }    /**      Adds an answer choice to this question.      @param choice the choice to add      @param correct true if this is the correct choice, false otherwise   */   public void addChoice(String choice, boolean correct)   {      /*  code goes here */   } }

Java with screen shot please

In writing a general-purpose sort method in Java, the sort method needs to compareobjects. There are two ways to give the sort method the code to compare objects,implementing the interfaces Comparable and Comparator respectively. Extend Article class toimplement Comparable interface so that the default sorting of the Articles is by its volume

Build two classes (Fraction and FractionCounter) and a Driver for use in counting the number of unique fractions read from a text file.   We’ll also reuse the ObjectList class we built in lab to store our list of unique FractionCounters, instead of directly using arrays or the ArrayList. Rather than designing a monolithic chunk of code in main like we did in the previous homework, we’ll practice distributing our code into containers (called classes) that you will design specifically to tackle this same problem in a different and more logically organized fashion. Remember NO DECIMALS! Handle input of any length Your project is to read in a series of fractions from a text file, which will have each line formatted as follows:   “A/B”.  A sample text file is listed below, and the purpose of your program is to read in one line at a time and build a Fraction object from A and B.  For each unique Fraction seen, your program will create a FractionCounter object used to track the number of…

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