Send out email in Java

/*from  ww w . j av  a 2s . c om*/
import java.awt.Desktop;
import java.net.URI;

public class Main {
  public static void main(String[] a)throws Exception {
      Desktop desktop = null;
      if (Desktop.isDesktopSupported()) {
        desktop = Desktop.getDesktop();
      }
      desktop.mail(new URI("mailto:a@a.net"));
  }
}