The best all in one management app for students!
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This is a desktop Student Planner. It has a GUI but most of the user interactions happen using a CLI (Command Line Interface).
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It is written in OOP fashion. It provides a reasonably well-written code example that is significantly bigger (around 6 KLoC)than what students usually write in beginner-level SE modules.
Acknowledgements
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Some parts of this sample application were inspired by the excellent Java FX tutorial by Marco Jakob.
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Libraries used: TextFX, ControlsFX, Jackson, Guava, JUnit5
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The awesome Addressbook-Level4 used as the starting point of this amazing application