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Java module
subject			fact

Java module	is a subtopic of 9.1 - The Process of Design
	is a kind of module
module	has high cohesion if related aspects of a system are kept together in this module, and unrelated aspects are kept out
	is implemented
	lacks side effects if it does not modify any data, and does not leave behind any information, other than its result, that would have an effect on other computations
component	is reusable if it can be used in several different systems with little or no modification
	may perform a special-purpose function such as the user interface for a particular system

Kinds of Java module :

• Java class (17 kinds, 16 facts)
• Java method (12 kinds, 8 facts)
• Java package (3 kinds, 11 facts) - A collection of classes and interfaces