Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Java

Posted by Oshedhe Munasinghe
Oshedhe Munasinghe
8,108 Points

(UML) What's the different between usage dependency-arrow and Implement arrow?

I am really confused lets say:

public interface Foo{...}
public class Bar implements Foo{...}

then UML design should look like [ Bar ] --|> [ Interface Foo ]

  • --|> = implements

But what the hell is Usage Dependency? and the arrow looks like -->

Can someone give me a code example how Usage Dependency looks like? (don't give me complicated codes :joy: :wink: )

chrisverra
chrisverra
3,760 Points

you already have usage dependency :)

Bar is dependant of Foo

Oshedhe Munasinghe
Oshedhe Munasinghe
8,108 Points

Hi Chris! You cant just draw arrow like this [ Bar ] --> [ Interface Foo ] that mean something ells..:yum: