JAVA-calculator

说明：  1. 能够实现根据以下关键字查询：学生姓名 、学号、班级、课程名称。 2. 能够实现按照单科成绩、总成绩、平均成绩、学号排序。 3. 能够实现学生信息的插入、删除和修改。 4. 能够查询每个课程的最高分、最低分及相应学生姓名、班级和学号。 5. 能够查询每个班级某门课程的优秀率(90 分及以上)、不及格率，并进行排序。(1. Be able to query according to the following keywords: student name, student number, class, course name. 2. It can be sorted according to single subject score, total score, average score and student number. 3. Be able to insert, delete and modify student information. 4. Be able to query the highest score and lowest score of each course and the corresponding student name, class and student number. 5. Be able to query the excellent rate (90 points and above) and failure rate of a course in each class, and sort them.)

说明：  xchart源代码，包含了大量的条形统计图 ，曲线 ，折线，弧形等众多画图源码(xchart source code Contains a large number of bar statistics curves, polygons arcs and many other drawing source code.)

Escaping to the same target from both the try and catch blocks of try..catch..finally should not fail at compile-time.

java中利用三大框架整合的项目，请大家认真查看( java中利用三大框架整合的项目，请大家认真查看)

说明：  java mainshi baodian chuji pian

x3d做的电影院,分三个场景，有影片点播功能(cinima)

一个简单的使用Spring框架实现MVC的例子(use a simple framework for achieving Spring MVC example)

Java编程思想第四版完整中文高清版(免费)(Java programming ideas fourth edition of the complete Chinese HD version (free))

给出了几种用java语言编写的登陆界面的例子，希望对初学者有帮助(Given several landing using java language interface examples, I hope to help beginners)

说明：  谷粒学院后台接口，谷粒学院是一个B2C模式的职业技能在线教育系统，分为前台用户系统和后台运营平台(Cereal college background interface, cereal college is a B2C mode of vocational skills online education system, divided into the foreground user system and background operation platform)