Description: 2. Design a simple course management system (CourseManager). Key features include:
(1) entry program information. Including: course number (no), course name (name), credits (grade) and the like
(2) information about courses. Information based curriculum, course name and credit and other inquiries courses. Note: query results may not be unique.
(3) Course modify information. Inquiry based curriculum to the specified courses, and then replaced with new content.
(4) Delete 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.
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Exe4_2.java
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