Toolkit: getScreenSize()
/* * Output: Screen width = 1280 Screen height = 1024 */ import java.awt.Dimension; import java.awt.Toolkit; public class MainClass { public static void main(String[] args) { Toolkit tk = Toolkit.getDefaultToolkit(); Dimension d = tk.getScreenSize(); System.out.println("Screen width = " + d.width); System.out.println("Screen height = " + d.height); } }