文件名称:First_Experiment
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实验目的：掌握使用基本控件和合适布局管理器进行界面设计的方法，掌握简单的事件处理方法。能根据要求设计出美观界面并实现所要求功能。
实验内容：实现成绩的查询和排序。具体要求如下：使用JTabbedPane，建立三个选项卡“成绩输入”、“成绩查询”、“成绩排序”
① 成绩输入：从界面上输入学生的学号和成绩，点击“确认”按钮进行保存。
② 成绩查询：输入学生的学号，点击“查询”按钮，显示该生成绩。
③ 成绩排序：点击“排序”按钮，将按成绩从高低显示学生的学号和成绩。
请选择合适的布局管理。-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
实验内容：实现成绩的查询和排序。具体要求如下：使用JTabbedPane，建立三个选项卡“成绩输入”、“成绩查询”、“成绩排序”
① 成绩输入：从界面上输入学生的学号和成绩，点击“确认”按钮进行保存。
② 成绩查询：输入学生的学号，点击“查询”按钮，显示该生成绩。
③ 成绩排序：点击“排序”按钮，将按成绩从高低显示学生的学号和成绩。
请选择合适的布局管理。-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
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First_Experiment.java