Java Design Pattern A Tutorial eBook
Author: James Cooper
Design patterns describe how objects communicate without become entangled in each other’s data models and methods. Keeping this separation has always been an objective of good OO programming, and if you
have been trying to keep objects minding their own business, you are probably using some of the common design patterns already. Design patterns began to be recognized formally in the early 1990s by Helm (1990) and Erich Gamma (1992), who described patterns incorporated in the GUI application framework, ET++.
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