Another Strange bundle or did Sun and Yahoo merge ?

I was prompted today to update the Java framework on my laptop.
I said, yes, update it and then I’ve seen the picture below:

So, I ask, what the hack has Yahoo to do with Sun ?
Why a stupid, useless and nerving toolbar is being installed with the Java framework ?

Did Sun buy Yahoo or Yahoo did buy Sun ?
No

So why ?
Of course, I am an ideologist and don’t accept the obvious answer: for money which Yahoo paid to Sun.