Java Programming

Using Files for Input and  Output

Write complete Java programs from the instructions and output  examples given.

1. a. Critical Thinking Exercise: Design a Java program that a  small gift shop could use to order mer- chandise. The wholesaler requires that  you send your order as a file over the Internet. Create your order file by  entering your input through dialog boxes and writing to an output file named  order.out. The order information that is output for each item consists of two  lines: The first line contains the quantity of the item, a blank, the wholesale  cost for that quantity of items, and an end-of-line character. The second line  contains the description of the item and an end-of-line character. Design your  program to ask for two different items to order. Write your design in the following  space. Your design should be a list of Java comments without any code.

1. b. Write a Java program based on the design you created in  Exercise 1a. Enter the program, saving it as Gifts1.java, and then execute the  program. Follow your instructor’s require- ments for  submitting output.Save your source code,your .class file, and your order.out  file to the device or location specified by your instructor. (Windows users can  copy the active window or dialog box by pressing Alt+Print Scrn to copy the  active window or dialog box to the Clipboard. Each time a new dialog box  appears during execution, you can save the output to a separate document using  a program such as Microsoft Word. If this is done,name your document  Gifts1Screens.doc, and then print the Gifts1Screens document and attach it to a  printed copy of your program along with the printed copy of your order.out  file.) (UNIX users should save their .class file to disk, then either submit  the disk or send the file electronically to their instructor.) Following are  copies of dialog boxes that might appear depending on the data entered. After  the dialog boxes, a copy of the order.out file that you created is displayed.

2. a. Design a program that builds on Gifts1.java. Copy the  order.out file that you created in Lab 3.4 Exercise 1 and save it as order.in  to the device or location specified by your instructor.

After the gift shop has received an order from the wholesaler,  the program should create an inventory file.Assume that all items ordered were  received. Design your program to read the file order.in and write the file  inventory.out.The file inventory.out will contain the num- ber of items  received,the retail cost that is found by dividing the wholesale cost by the  quan- tity ordered and multiplying by 2.4, and the description of the item.

Write your design in the following space. Your design should be  a list of Java comments with- out any code.

2. b. Write a Java program based on the design you created in  Exercise 2a. Enter the program,sav- ing it as Gifts2.java, and then execute the  program. Follow your instructor’s requirements for submitting  output. Save your source code, your .class file,and your inventory.out file to  the device or location specified by your instructor.

(Windows users can copy the active window or dialog box by  pressing Alt+Print Scrn to copy the active window or dialog box to the Clipboard.  Each time a new dialog box appears during execution,you can save the output to  a separate document using a program such as Microsoft Word.If this is done,name  your document Gifts2Screens.doc, and then print the Gifts2Screens document and  attach it to a printed copy of your program along with the printed copy of your  inventory.out file.)

(UNIX users should save their .class file to disk, then either  submit the disk or send the file electronically to their instructor.)

Following are copies of dialog boxes that might appear depending  on the data in the file order.in.After the dialog boxes is a copy of the  inventory.out file.