Java Programming

Hi all,

I have this code:

Toolkit tk = Toolkit.getDefaultToolkit();
        Dimension screen = tk.getScreenSize();     
        if(((height=screen.getHeight())>=768)&&
            ((width=screen.getWidth())>=1024)) 
        {
            //Do nothing. Variables width and height already set inside if condition.
        } 

where variables height and width are in pixels.

However in another part of my program i want to set the position of a JLabel . From what i understand the setPosition method requires cm.

Can anyone tell me how to convert pixels to cm in a safe way.

Thanks in advance.