Lesson 6 - UML - State Machine Diagram

In the previous lesson, UML - Class Diagram, we learned how to use class diagrams. In today's UML tutorial, the State machine diagram is waiting for us.

State machine diagram displays the entity's life cycle. It's a behavioral diagram, describing all possible states of a given entity and transitions between them. The diagram is very simple and has the theoretical foundations in the finite automaton, but we're not going to bother with that.

We create this diagram for important entities and it provides us with a look at their life cycle. It can clarify the development and make clear when and which state the entity will enter. We have a possibility to see how the system works in real-time. The change of the state occurs with

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The State Machine diagram displays the entity's life cycle. Describes the entity states and transitions between them.

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