Use system default printer to print a file out in Java

/*  w  w w.  ja va  2s  .com*/
import java.awt.Desktop;
import java.io.File;
import java.io.IOException;

public class Main {
  public static void main(String[] a) throws Exception{
      Desktop desktop = null;
      if (Desktop.isDesktopSupported()) {
        desktop = Desktop.getDesktop();
      }
      desktop.print(new File("c:\\a.txt"));
  }
}