class_diagram2.wsd

@startuml practice1
abstract class Engineer {
    {abstract} + design(): void;
    {abstract} + implement(): void;
    {abstract} + test(): void;
    {abstract} + getName(): String;
    + work(): void;
}
class BackendEngineer {
    - name: String;
    + design(): void;
    + implement(): void;
    + test(): void;
    + getName(): String;
}
class FrontendEngineer {
    - name: String;
    + design(): void;
    + implement(): void;
    + test(): void;
    + getName(): String;
}

Engineer <|-- BackendEngineer
Engineer <|-- FrontendEngineer
@enduml