setPreferredSize across 2 monitors

I have 2 monitors and I want a JFrame to be displayed across the 2 monitors.

when I force the frame to be set with the size it seems to have the dimensions I entered but does not span across the 2 monitors.

JFrame frametest =new JFrame();

frametest.setPreferredSize(new Dimension(2280,1520));// width and height.

does Java have a limitation of setting the size/preferredsize or am I going about this the wrong way?

thanks in advance for your help.

[584 byte] By [ricochet_008a] at [2007-11-27 11:51:08]