The fourth code example reads:

...
.add( Restrictions.in( "name", new String[] { "Fritz", "Izi", "Pk" } ) )
...

which seems strange since the API is:

Restrictions.in( String, Object[] )

and String[] in Java is not a subtype of Object[]

15.4 Associations

have a parenthesis missing in:


[/code]

If you look into Java API, you will see Sting is inherited from an Object ...

I think you'll find that:

String != String[]

and

Object != Object[]

and despite String being a subtype of Object,

String[] is not a subtype of Object[]

In Java, arrays are treated like objects, but deep down they are just C-style arrays. They inherit from Object sure, but you can't extend them and they really don't have methods. You can think of them as implementing generics, only before it was actually posible in Java. As if there were an array class implemented as such:

class Array<T> ...

So, carrying on the example, a method expecting an Array<Object> would certainly accept an Array<String>. That's the case here.

ok I concede... I'm wrong.