Java SE (Java Platform, Standard Edition)

Hello,

Does anyone familiar with this org.netbeans.lib.awtexttra.AbsoluteConstraints(). I want to set the size and location of the component, and I know this org netbeans can provide this function.
getContentPane().add(chkTausta, new org.netbeans.lib.awtextra.AbsoluteConstraints(10, 120, -1, -1));

chkRakkennus.setSelected(true);
chkRakkennus.setText("Rakennukset");

then it comes an error that org.netbeans.lib.awtextra.AbsoluteConstraints()cannot be resolved. Does anyone know what�s the reason. Do I have to download other version of Java. I have Jre1.6.0?
Does anybody knows is there another way to set size of component. For example, if I use borderlayout, and put a button to the west, then how can I set the location and size of the button?

Thanks a lot for you help.
Clare