| Screen.java | 
package graphics;
import java.awt.*;
public class Screen {
  public static int getDpi() {
    Toolkit t =
        Toolkit.getDefaultToolkit();
    return t.getScreenResolution();
  }
  public static Dimension getSize() {
    Toolkit t = Toolkit.getDefaultToolkit();
    return t.getScreenSize();
  }
  public static void main(String args[]) {
    System.out.println("DPI=" + getDpi());
    java.awt.Dimension d = getSize();
    System.out.println("size in pixels (width,height)= ("
                       + d.width + "," + d.height + ")");
  }
}