UML Class Diagrams Cheatsheet

UML is a standard way to visualize the design of your system and class diagrams are used across the industry.

They consist of:

• Class

  Acts as the blueprint that defines the properties and behavior of an object.

• Attributes

  Attributes in a UML class diagram represent the data fields of the class.

• Methods

  Methods in a UML class diagram represent the behavior that a class can perform.

• Interfaces

  Defines a contract for classes that implement it. Includes a set of methods that the implementing classes must provide.

• Enumeration

  A special data type that defines a set of named values such as product category or months in a year.

• Relationships

  Determines how one class is related to another. Some common relationships are as follows:

  • Association
  • Aggregation
  • Composition
  • Inheritance
  • Implementation