Storing an ArrayList Create a Java program that will store 10 student objects in an ArrayList, ArrayList. A student object consists of the following fields: int rollno String name String address Implement two comparator classes to sort student objects by name and by rollno (roll number). Implement your own selection sort method and place your code in a separate Java source file. Do not use a sort method from the Java collections library.
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Storing an ArrayList
Create a Java
- int rollno
- String name
- String address
Implement two comparator classes to sort student objects by name and by rollno (roll number). Implement your own selection sort method and place your code in a separate Java source file. Do not use a sort method from the Java collections library.
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Instead of displaying the information on the console is it possible to implement a simple graphical user interface to display the data? What would that look like? Also, can you identify where the selection sort method is in the
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- Define a class called Book. This class should store attributes such as the title, ISBN number, author, edition, publisher, and year of publication. Provide get/set methods in this class to access these attributes. Define a class called Bookshelf, which contains the main method. This class should create a few book objects with distinct names and store them in an ArrayList. This class should then list the names of all books in the ArrayList. Enhance the program by providing a sort function, which will sort the books in ascending order of their year of publication. Create a few more Bookobjects with the same names but with different edition numbers, ISBNs, and years of publication. Add these new Book objects to the ArrayList, and display the book list sorted by book name; for duplicate books of the same name, sort the list by year of publication. (Hint: You will need to define a comparator class that takes two Book objects as parameters of the compareTo This method should do a two-step…Create a text file called question2.txt and populate it with random characters, numbers,and symbols in a specific pattern. Write a Java program that implements an ArrayListto store the contents of this text file. The program should display the contents of thetext file in the console, and then sort the contents according to numeric order. Thesorted contents should be displayed in the console again.Note: Numeric order sorting rule is based on the numeric value of elements, such assorting a list of integers in odd-even order.Storing an ArrayList Create a Java program that will store 10 student objects in an ArrayList, ArrayList<Student>. A student object consists of the following fields: int rollno String name String address Implement two comparator classes to sort student objects by name and by rollno (roll number). Implement your own selection sort method and place your code in a separate Java source file. Do not use a sort method from the Java collections library. ***Code from previous question does not work***
- Challenge 3: Scores.java and TestScores.java Implement a Scores class. The class constructor should accept an array of scores as its argument. The class should have a method that returns the average of the scores. If any score in the array is negative or greater than 100, the class should throw an IllegalArgumentException. Implement a TestScores class that creates an array and fills it with numbers given by the user. It should catch the exception thrown when the user enters an illegal value.--------------Answer question below:-------------- In Java: Given a Student class, create a class with following characteristics: The class name should be ClassRoom. Private variable students array to maintain the list of Student objects. Function addStudent with input parameter name (string) and rollNo(int) adds a new student in “students” list. Method getAllStudents should return all the students in ClassRoom. Input Jack 1 Jones 2 Marry 3 where, First & Second line represent a student’s name and roll number. And so on. Output 1 - Jack 2 - Jones 3 - Marry Assume that, Maximum “students” count can be 10. DriverMain.java and Solution.java attached.Create a class called CustomerListerwith a mainmethod that instantiates an array of Stringobjects called customerName. The array should have room for five Stringobjects. Use an initializer list to put the following names into the array:Cathy Ben Jorge Wanda FreddieUse newto create a second doublearray called customerBalancein the mainmethod. Allow room for five customer balances, each stored as a double.In the loop that prints each customer name, add some code to prompt the user to enter a balance for that customer. Read the keyboard input with a Scannerobject. Use the following balances for the input:100.00234.562.4932.32400.00After all the balances have been entered, print out each customer and his/her balance.
- 2. Write a class ArrayClass, where the main method asks the user to enter the four num bers. Create a method printArray that prints the array whenever required (use Acrav.toString method). Make the program run as shown in the Sample Run below. Green is user input. Use Attax.sort, Attach.bianrySearch. Attaveauals Sample Run List1, Enter four num bers: 2 33 2 List2, Enter four num bers: 6 25 4 List3, Enter four num bers: 52 46 Your original Listi: [2, 3, 3, 2] Your original List2: [6, 2, 5, 4] Your original List3: [5, 2, 4, 6] Sorted Listi is: [2, 2, 3, 3] Enter a number from the sorted List1 to search for: 3 Value 3 is in index 2 (or position 3) List that are the same when sorted: [2, 4, 5, 6]Please create a Java class that has the following data attributes and methods: private int count - number of customers in the array private customer Record[] data - array of customerRecord objects public customer List() constructor that should initialize memory for data array and count value public void getCustomerList(String fileName) - reads a file call fileName which is a text file containing lines (records) of customer data. This method fills the data array with the records from the file. The file will not have more than 100 records and will have the following format (where customer Number is an integer, firstName and lastName are Strings, and balance is a float: customerNumber firstName lastName balance public customerRecord getCustomer(int customerNumber) - returns the object corresponding to the customer with customerNumber. If the customer number is not in the array, return null. public void enter CustomerRecord(customerRecord new_record)…Computer Science Java Program Write a program in Java that takes in a user-submitted file that is a grid of 0s and 1s. Represent the grid as a two-dimensional array. Write a program that: a. computes the size of a group when a square in the group is given b. computes the numbers of different groups c. lists all groups Example: userInput.txt: 0 0 0 0 0 0 0 0 0 10 0 0 1 1 0 0 0 0 10 0 0 0 0 0 0 0 0 00 0 0 0 1 0 0 1 0 00 0 0 1 0 0 0 1 0 00 0 0 0 0 0 0 1 1 00 0 0 0 1 1 0 0 0 00 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 The program should output three things: The size of the group in which location specified by the user belongs. then if the user enters 1,2 the answer is 0 1,4 the answer is 2 3,4 the answer is 1 4,7 the answer is 4 The number of each size group Size Count 2 3 1 List of each group’s locations 1: (0,9) (1,9) 2: (1,3) (1,4) 3: (3,4) 4: (3,7) (4,7) (5,7) (5,8) 5: (4,3) 6: (6,4) (6,5)
- Arrays: create an array of a given type and populate its values. Use of for loop to traverse through an array to do the following : to print the elements one by one, to search the array for a given value. ArrayList: create an ArrayList containing elements of a given type . Use some of the common ArrayList methods to manipulate contents of the ArrayList. Write methods that will take an ArrayList as its parameter/argument ; and/or return an ArrayList reference variable as its return type. Searching for an object in an Array: Loop through the ArrayList to extract each object and to check if this object’s attribute has a given value. Explain how and why interfaces are used in Java Collection Framework. Explain the major differences between a Stack and a Queue. Be able to use stack and queue methods. What is meant by O(N) notation? Express the complexity of a given code using the O(N) notation.Scanner sc = new Scanner(System.in);ArrayList <Student> students = new ArrayList<Student>();ArrayList <Student> courses = new ArrayList<Student>();// Method to read the file contents and stores it in// instance arraysvoid readStudents(){// Scanner class object declaredScanner readStuF = null;// try block beginstry{// Opens the file for readingreadStuF = new Scanner(new File("student.txt"));// Loops till end of the file to read recordswhile(readStuF.hasNextLine()){ String stu = readStuF.nextLine();String []eachStu = stu.split(" ");students.add(new Student(eachStu[0], eachStu[1],eachStu[2], Long.parseLong(eachStu[3]),Integer.parseInt(eachStu[4]), Integer.parseInt(eachStu[5]),Integer.parseInt(eachStu[6])));}// End of while loop }// End of try block// Catch block to handle file not found exceptioncatch(FileNotFoundException fe){System.out.println("\n ERROR: Unable to open the file for reading.");}// End of catch block // Close the filereadStuF.close();}// End of…/* Rack.java by Craig Persiko Starter file for Exercise for Chapter 13 in CS 111B This class stores an ArrayList of Tile objects, sorts them, and returns them via .toString() DO NOT CHANGE THE FOLLOWING CODE. YOUR JOB IS TO ADD THE FOLLOWING METHODS: .toString() .sortHighToLow() You may also add any helper methods you want, such as swapValues. Make sure to write the Selection Sort algorithm like in the class example, but using the Tile object's .compareTo method. You can copy my code from my example, and then change it to fit your program. Note that we want to sort Tiles from highest value to lowest (the opposite order from our example.)*/ import java.util.ArrayList; class Rack{ private ArrayList<Tile> tiles; public Rack() { tiles = new ArrayList<Tile>(); } public void addTile(Tile t) { tiles.add(t); } /* DO NOT CHANGE THE ABOVE CODE. YOUR JOB IS TO ADD THE FOLLOWING METHODS: .toString() .sortHighToLow() You…