Question

I read the illustrated relationship as:Class A associated with class B

So,what is the meaning of :

1) +class B at the end of association

2)0..1

Now,how can I read the relationship?

Answer 1

completely agree with @Wolfgang Fahl and @Idan Arye

Here some elaboration

1)your question touches the Association ends and in your case the

visibility (+)followed by role-name(class B)

An association end specifies the role that the object at one end of a
relationship performs. Each end of a relationship has properties that
specify the role of the association end, its multiplicity, visibility,
navigability, and constraints.

2)to be more involved,look at the following class diagram:

customer may have many reservation

but each reservation owns by one customer

Hope this help you