java-tutorials/patterns/src/main/resources/front_controller.puml

@startuml
scale 1.5
class Handler {
doGet
doPost
}

abstract class AbstractCommand {
process
}
class ConcreteCommand1 {
process
}
class ConcreteCommand2 {
process
}

Handler .right.> AbstractCommand
AbstractCommand <|-- ConcreteCommand1
AbstractCommand <|-- ConcreteCommand2

@enduml