import java.awt.AWTException;
import java.awt.Color;
import java.awt.Frame;
import java.awt.Robot;

public class FsMacos {
    public static void main(String[] args) throws AWTException {
        Robot robot = new Robot();
        Frame f = new Frame();
        f.setBackground(Color.CYAN);
        f.setSize(100, 100);
        f.setLocationRelativeTo(null);
        f.setVisible(true);
        robot.delay(1000);

        try {
            f.getGraphicsConfiguration().getDevice().setFullScreenWindow(f);
        } finally {
            robot.delay(5000);
            f.dispose();
        }
    }
}