Class

Class Diagram

Class diagrams are designed using a syntax that mirrors those traditionally employed in programming languages. This resemblance fosters a familiar environment for developers, thereby facilitating an easier and more intuitive diagram creation process.

See PlantUML Class Diagram for more information.

Diagram Code

These diagram examples were created from the following PlantUML code:

Show code of Main Class Diagram
or go directly to Class.puml on GitHub

@startuml
abstract        abstract
abstract class  "abstract class"
annotation      annotation
circle          circle
()              circle_short_form
class           class
class           class_stereo  <<stereotype>>
diamond         diamond
<>              diamond_short_form
entity          entity
enum            enum
exception       exception
interface       interface
metaclass       metaclass
protocol        protocol
stereotype      stereotype
struct          struct
@enduml

Show code of Class Diagram with Abstract Interface
or go directly to Class-Abstract-Interface.puml on GitHub

@startuml
hide empty members
abstract class AbstractList
abstract AbstractCollection
interface List
interface Collection

List <|-- AbstractList : AList to List <
Collection "many" <|-- "many" AbstractCollection : AColl to Coll

Collection <|- List : List to Coll
AbstractCollection <|- AbstractList : AList to AColl
AbstractList <|-- ArrayList : ArList to AList
note on link: this is a note\non link

class ArrayList {
  Object[] elementData
  size()
}

enum TimeUnit {
  DAYS
  HOURS
  MINUTES
}

annotation SuppressWarnings
SuppressWarnings +-l-> ArrayList
annotation Annotation  <<stereotype>> {
  annotation with members
  String foo()
  String bar()
}

class Dummy {
 -field1
 #field2
 ~method1()
 +method2()
 {static} String id
 {abstract} void methods()
}

note "This is a floating note" as N1

N1 #-u-> AbstractCollection
N1 -r-> ArrayList

package foo_frame <<Frame>> {
  class Foo<? extends Element> {
    int si ze()
  }
}
Foo *-- Element
Element --() interface

note right of Foo::size
   This is a note
end note

note right of Element
   This is a note
end note

class User <<user>> <<admin>> {
  .. Simple Getter ..
  + getName()
  + getAddress()
  .. Some setter ..
  + setName()
  __ private data __
  int age
  -- encrypted --
  String password
}
@enduml

Show code of Class Diagram with Cardinality Generic QualifiedAssociations
or go directly to Class-Cardinality-Generic-QualifiedAssociations.puml on GitHub

@startuml
' Source: https://github.com/plantuml/plantuml/issues/1467 '

interface Map<K,V>
class HashMap<Long,Customer>

Map <|.. HashMap
Shop [customerId: long] ---> "customer\n1" Customer
HashMap [id: Long] -r-> "value" Customer
@enduml