使用Java语言编写一个模拟网上超市购物结算功能的程序，要求程序运行后有一个图形用户界面，可供用户输入购买的各种商品相关信息，最后给出用户的购物清单及价格，并且用户可以根据需要查询自己购买的第几项商品的详细信息。(Using the Java language to write a program that simulates the shopping and clearing functions of the online supermarket. It requires a graphical user interface after the program runs. It can be used to input all kinds of commodity related information of the purchase. Finally, the user's shopping list and price are given, and the user can inquire the details of the number of items purchased by the user according to the need. Fine information.)