code: import java.awt.*;
  import javax.swing.JFrame;
  
  public class Test extends JFrame {
  
      public static void main(String[] args) {
          new Test();
      }
  
      Test() {
          Toolkit toolkit = Toolkit.getDefaultToolkit();
  
          Dimension screenSize = toolkit.getScreenSize();
          System.out.println("Physical screen size: " + screenSize);
  
          Insets insets = toolkit.getScreenInsets(getGraphicsConfiguration());
          System.out.println("Insets: " + insets);
  
          screenSize.width -= (insets.left + insets.right);
          screenSize.height -= (insets.top + insets.bottom);
          System.out.println("Max available: " + screenSize);
      }
  }
  