Java Quick Notes

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  Sample Img 1

Please take a look at the "Sample Usecase diagram" .

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  Sample Img 2

Please take a look at "Sample Activity Diagram".

i)This pic  has a  Join.

ii) Split

iii) Fork

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  Sample Img 3

 Please take a look at above diagram.

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  Sample Img 4

Inheritance :
Inheritance is indicated by a solid line with a closed, unfilled
arrowhead pointing at the super class

Accessibilty :

- indicates private
+ indicates public
# indicates protected

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  Sample Img 5

Realization:
A dotted line with a closed, unfilled arrow means realization
(or implementation);

Please take a look at sample Class Diagram above.

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  Sample Img 6

Composition:

Child should not exist without parent , in the following example if Company is removed,
Department is being automatically removed.

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  Sample Img 7

Aggregation:

An association with an aggregation relationship indicates that one
class is a part of another class. In an aggregation relationship,
the child class instance can outlive its parent class. 

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  Sample Img 8

Dependency :

A dependency relationship is a relationship in which changes to one model element
 (the supplier) impact another model element (the client). You can use dependency
 relationships in class diagrams, component diagrams, deployment diagrams,
 and use case diagrams.

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  Sample Img 9

Please take a look at a sample Deployment Diagram.

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