What do the diffrent lines represent in UML diagram?

Question

I want to understand when we are supposed to use a solid line and a dash line. If there are any other type of lines as well.

Comments

I just looked up some different websites and readings that explained it in a different way and I think that it makes a lot more sense now. Ill attach the two websites that I have looked at so far.

https://www.umlboard.com/docs/relations/

https://creately.com/guides/class-diagram-relationships/

Answer 1

Hmm... I think the first step would be to read the assigned UML reading that was on Moodle.

ASSIGNED READING: UML class diagrams (by Dale Skrien)

If you still have questions about the lines/arrows after reading it, let us know!

Answer 2

You would use a solid line with an "empty" arrowhead for a subclass.
You would use a dashed line with an "empty" arrowhead when you are implementing an interface.
The other time you would use a dashed line is if one class is dependent on the other (changes to the second class require changes to the first). In that case, you want to use a dashed line with a primitive arrow (just the V shape, not a triangle). Only include a dependency line if there is not already an associative line between the two classes.