Help with a small popup

I have a jLabel containing a name, and have made another small jLabel which is a small "?".

I would like to make a small hovering explanation of the name to appear (20 words or so) when the mouse is rolled over the question mark.

Can anyone help me out please?

Thanks.

[294 byte] By [Shorinhioa] at [2007-11-27 10:59:47]