Write a Java program that uses ArrayList and Iterator. It should input from user the names and ages of your few friends in a loop and add into ArrayList. Finally, it should use an terator to display the data in a proper format.

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…

Write a program called Guests.java that prompts a user to enter how many guests he will host. Next, reads a series of the names into an array of Strings using Scanner, and then prints back "Welcome" to all of those guests.

write a Java program that works like this) passes an array to a function and performs a given operation (any operation) within that function. Loops (the array using iterative loops. Together) if statements

write java program for the above question

Write a method with header static void DisplayIntArray(int[] numbers). The first argument is an array of ints. There is no return value. This method displays all the elements of the argument on a single line. Each item will occupy three columns.Call this method from main with a suitable argument. Write a method with header static int[] GenerateRandomIntArray(int numberOfItems, int largestValue). The first argument is an int indicating the number of elements that will be present in the return array. The second argument is an int representing the largest item in the array. The returned value is an array of integers. This method does the following: Declare and initialized a variable of type Random (Random generator = new Random();) Declare an array of type int (you may call it result) Allocate storage for the correct number of items Using your favorite looping statement, assign a random integer to each element of the array (result[i] = generator.Next(largestValue);) In your…

In Java: Write a method that multiplies all elements in the array by 3 and returns it to the main method.

write a program that reads the students.txt file and stores the name of the student and the grade information as a student object in an arraylist sorts the students names based on their first grade in decreasing order using the selection sort algorithm writes the sorted list as the students last name , middle name (if theres one), first name , and grade information into a text file output example: Robison, Lee 95 80 Green, Alex R 85 60 Waston, Zoe G 100 80   use java

Write a Java program that would resemble banking transactions of deposits, withdrawals, bank to bank transfers, and interest computations. A transaction input window is to be used in entering the account number, transaction code, and amount. Search a 2d-arraylist containing account number and the current balance, and then do the appropriate update on the 2d-arraylist depending on the transaction code. If the transaction code is “D”, update the current balance by adding the amount; if “W”, update the current balance by subtracting the amount from the current balance provided that withdrawal transaction is allowed (current balance must be greater than the amount to be withdrawn, and the resulting balance must not be less than 500). Display the updated 2d-arraylist before exiting the program. Design your own input/output windows. ( USE OOP CONCEPT AND JOPTION)

Sorting an array of batting averages would be useful only if you sort another array in the same sequence in Java. Explain.