使用 字符流和和GUI类 编程实现以下功能：
（1）设计图形化界面，至少包括文本类控件类。接收从键盘输入姓名、学号、成绩，并保存到文本文件中，重复进行。（2）从文件中读取各学生的成绩，并计算所有学生成绩的平均值、最大值和最小值，排序后输出到另一文本文件。(Use character stream and GUI class programming to achieve the following functions:
(1) Design graphical interface, at least including text control class. Receive from the keyboard input name, student number, grade, and save to a text file, repeat. (2) Read the scores of each student from the file, calculate the average, maximum and minimum scores of all students, and output them to another text file after sorting.)