Implement and test an inventory application in Java that will allow a client to manage information about a store inventory. The application should allow the client to start with an empty inventory and then manage it by adding, deleting, searching, and displaying specific information from the inventory according to the specification below. Your application should offer the client a menu with the following operations: 0. Exit the program. 1. Add an item. 2. Delete an item. 3. Display info about an item. 4. Update an item. 5. Display content of inventory. 6. Display info about items (by shelf). 7. Display info about the most/least expensive item. Develop an extensive test suite and test your program thoroughly on it. Your test suite must include, but should not be limited to, the data from this input file. A sample run on this data can be found in this output file. Here is the specification of the functionality of the inventory application: 1. Add an item: Adds an item in the inventory. The item name uniquely identifies an item in the inventory. Requests the following input from the client of the program: item name, item amount, item price, item shelf location. If the item name that is specified is already in the inventory, the program should prompt the client for a different item name. Examples: (shirt,5,20,2)

In this exercise, you modify the Grade Calculator application from this chapter’s Apply lesson. Use Windows to make a copy of the Grade Solution folder. Rename the copy Grade Solution-Intermediate. Open the Grade Solution.sln file contained in the Grade Solution-Intermediate folder. Open the CourseGrade.vb file. The DetermineGrade method should accept an integer that represents the total number of points that can be earned in the course. (Currently, the total number of points is 200: 100 points per test.) For an A grade, the student must earn at least 90% of the total points. For a B, C, and D grade, the student must earn at least 80%, 70%, and 60%, respectively. If the student earns less than 60% of the total points, the grade is F. Make the appropriate modifications to the DetermineGrade method and then save the solution. Unlock the controls on the form. Add a label control and a text box to the form. Change the label control’s Text property to “&Maximum points:” (without the quotation marks). Change the text box’s name to txtMax. Lock the controls and then reset the tab order. Open the form’s Code Editor window. The txtMax control should accept only numbers and the Backspace key. Code the appropriate procedure. The grade should be cleared when the user makes a change to the contents of the txtMax control. Code the appropriate procedure. Modify the frmMain_Load procedure so that each list box displays numbers from 0 through 200. Locate the btnDisplay_Click procedure. If the txtMax control does not contain a value, display an appropriate message. The maximum number allowed in the txtMax control should be 400; if the control contains a number that is more than 400, display an appropriate message. The statement that calculates the grade should pass the maximum number of points to the studentGrade object’s DetermineGrade method. Make the necessary modifications to the procedure. Save the solution and then start and test the application.