// Java Programming Language.

Programming Exercises 19. A database is to be developed to keep track of student information at your college. It will include names, identification numbers, and grade point averages. The data set will be accessed in the key field mode, with the student's name being the key field. Code a class named StudentListings that defines the nodes. Your class should include all the methods in the class shown in Figure 2.28 except for the setAddress () method. It should also include a no-parameter constructor. Test it with a progressively developed driver program that verifies the functionality of all of its methods. 20. Code a class that implements the Sorted Array structure, and write a progressively developed driver program that verifies the functionality of all of its methods. Assume that it is to store a ta set whose nodes are described in Exercise 19. Include error checking in the code of the 122 Chapter 2: Array-Based Structures basic operation meth ic operation methods, a constructor to permit the client to specify th the data set, and a method to display th data set, and a method to display the contents of entire data set in sorte axinu at your college 21. Code an application program that keeps track of student information identification numbers, and grade point averages in a fully encasu le Sorte darray-baseddata structure, when launched,the user will beaskedeto ( asked to in mog nput the mum size of the data set, the initial number of students, and the initial complete, the user will be presented with the following menu: Enter: 1 to insert a new student's information, 2 to fetch and output a student's information, 3 to delete a student's information, 4 to update a student's information, 5 to output all the student information in sorted order, and 6 to exit the program. The program should perform an unlimited number of operations until the exit the program. user enters a 6to oen track of faculty information at vour colle