我把要求发上来! Imagine that you are an owner of a hardware store and need to keep an inventory that can tell you what different kind of tools you have how many of each you have on hand and cost of each one. Now do the following: (1) Write a program (Tool.java) that, (1.1) Initializes (and creates) a file “hardware.dat” (1.2) lets you input that data concerning each tool, i.e. the program must ask the user for input and each of the user input is written back in the file. The file must have the following format: Record# Tool Name Qty Cost per item (A$) 1 Electric Sander 18 35.99 2 Hammer 128 10.00 3 Jigsaw 16 14.25 4 Lawn mower 10 79.50 5 Power saw 8 89.99 6 Screwdriver 236 4.99 7 Sledgehammer 32 19.75 8 Wrench 65 6.48 (1.3) Exception handling that must be taken into account- (1.3.1) User must not input incorrect data (1.3.2) Cost of the item must be a number (2) Write another program (ListToolDetails.java) that, (2.1) lets you list all the tools, i.e. it will read the data from “hardware.dat” in a proper manner (you can choose the display format), File name should not be hard coded. (2.2) lets you delete a record for a tool, as an example- you can delete all the details pertaining to the tool – Wrench. Once you delete the information, records must be updated in the “dat” file. This is a tricky bit- there is no method in FileI/O API to delete a record from a file! This bit is not covered by your lecture notes, you will have to some research on this one. (2.3) List the total price(rounded to two decimal places) of each tool, as an example, the total price of all the Hammers is A$128 * 10 = A$1280.00 (2.4) Exception handling that must be taken into account- (2.3.1) In case user inputs an incorrect file name (2.3.2) In case user inputs incorrect Tool name (when the user wants to delete something)
Imagine that you are an owner of a hardware store and need to keep an inventory that can tell you what different kind of tools you have how many of each you have on hand and cost of each one.
Now do the following:
(1) Write a program (Tool.java) that,
(1.1) Initializes (and creates) a file “hardware.dat”
(1.2) lets you input that data concerning each tool, i.e. the program must ask the user for input and each of the user input is written back in the file.
The file must have the following format:
Record# Tool Name Qty Cost per item (A$)
1 Electric Sander 18 35.99
2 Hammer 128 10.00
3 Jigsaw 16 14.25
4 Lawn mower 10 79.50
5 Power saw 8 89.99
6 Screwdriver 236 4.99
7 Sledgehammer 32 19.75
8 Wrench 65 6.48
(1.3) Exception handling that must be taken into account-
(1.3.1) User must not input incorrect data
(1.3.2) Cost of the item must be a number
(2) Write another program (ListToolDetails.java) that,
(2.1) lets you list all the tools, i.e. it will read the data from “hardware.dat” in a proper manner (you can choose the display format), File name should not be hard coded.
(2.2) lets you delete a record for a tool, as an example- you can delete all the details pertaining to the tool – Wrench. Once you delete the information, records must be updated in the “dat” file. This is a tricky bit- there is no method in FileI/O API to delete a record from a file! This bit is not covered by your lecture notes, you will have to some research on this one.
(2.3) List the total price(rounded to two decimal places) of each tool, as an example, the total price of all the Hammers is A$128 * 10 = A$1280.00
(2.4) Exception handling that must be taken into account-
(2.3.1) In case user inputs an incorrect file name
(2.3.2) In case user inputs incorrect Tool name (when the user wants to delete something)