Online supermarket shopping billing simulation using the Java language to write a simulation supermarket shopping online billing program, and asked the program to run a graphical user interface for the user to enter information about various goods to buy. Finally, the user' s shopping list and price, and the user can query the details required to buy their own first few goods. Demand Analysis: 1. Users can add to purchase a commodity, added information including product name, quantity and unit price of 2. Users can delete a commodity purchased 3. Users can query the details of a commodity has been purchased, the number of inquiries to the record number of goods specified in the query is (the record number of goods in accordance with the product purchase order series), you can also specify a query first or last purchase commodity information. 4. The user can delete all items added to the shopping cart 5. The user can print a list of items to purchase 6. The user can clear the informa

First_Experiment.java

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