java 图形用户界面编程.设计一个考试分数分布统计程序，要求该程序：

1）　　提供输入界面，可输入考生姓名和分数；

2）　　单击输入按钮，在登记考生姓名和分数的同时，立即绘制当前人数的分数分布统计饼图（分为优秀、良好、中等、不及格）

-. java programming graphical user interface to design a test score distribution statistics program requires the program: 1) to provide input interface, you can enter the names and scores of candidates　2) Click the Enter button in the registration of candidates names and scores at the same time, immediately draw current The number of fractional distribution statistics pie (divided into excellent, good, moderate, do not pass)