2. What is UML?
UML stands for Unified Modeling Language
UML is a diagramming language designed for Object-
Oriented programming
UML can be describe:
the organization of a program
how a program executes
how a program is used
how a program is deployed over a network
…and more
3. Why we use UML?
Use graphical notation: more clearly than natural language
(imprecise) and code (too detailed).
Help acquire an overall view of a system.
UML is not dependent on any one language or technology.
UML moves us from breakup to standardization.
4. Types of UML
Class diagram
Component diagram
Development diagram
Object diagram
Package diagram
Profile diagram
Composite structure diagram
Use case diagram
Activity diagram
State machine diagram
Sequence diagram
Communication diagram
Interaction overview diagram
Timing diagram
5. Class Diagram
A class diagram shows classes, interfaces, and their
relationships
It shows the classes in a system, attributes and operations of
each class and the relationship between each class.
ClassName
attributes
operations
6. Class Name
The name of the class is the
only required tag in the
graphical representation of a
class.
It always appears in the top-
most compartment.
ClassName
attributes
operations
7. Class Attributes
An attribute is a named property
of a class that describes the object
being modeled. In the class
diagram, attributes appear in the
second compartment just below
the name-compartment.
Person
name :
address :
Birthdate :
8. Class Attributes (Cont’d)
Attributes are usually listed in the
form:
attributeName : Type
Person
name : string
address : string
birthdate : int
9. Class Attributes (Cont’d)
Attributes can be:
+ public
# protected
- private
Person
+ name : string
-address : string
#birthdate : int
10. Class Operations
Operations describe the class
behavior
and appear in the third
compartment.
Person
name : string
address : string
birthdate : int
+Eat():void
+Sleep():void
+Work():void
+Play():void
