Design a simple course management system (CourseManager). Key features include: Entry course information. Including: course number (no), course name (name), credits (grade) and the like Queries course information. Information based curriculum, course name and credit and other inquiries courses. Note: query results may not be unique. Modify course information. Inquiry based curriculum to the specified courses, and then replaced with new content. Remove course information. Remove a specified course of information based curriculum. Design, the use of hierarchical design method, the class is divided into the interface layer (ui), the functional layer (business) and persistence (persistence) 3 layers in different sub-packages. The system code in the exe4_2 package.

project2\classes\exe4_2\business\CourseManager.class
........\.......\......\persistence\Course.class
........\.......\......\tester\Tester.class
........\project2.jcd
........\project2.jcp
........\project2.jcu
........\project2.jcw
........\src\exe4_2\business\CourseManager.java
........\...\......\persistence\Course.java
........\...\......\tester\Tester.java
........\...\Project2.java
........\...\Project2Frame.java
........\classes\exe4_2\business
........\.......\......\persistence
........\.......\......\tester
........\src\exe4_2\business
........\...\......\persistence
........\...\......\tester
........\classes\exe4_2
........\src\exe4_2
........\classes
........\src
project2

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