public class card_cardMessenger{

	/**
	* Send an e-mail message via the Runtime class
	* @see Runtime
	* @return boolean (success or failure of sending the mail)
	* @param String recipient
	* @param String subject
	* @param String e-mail message
	*/
	public static boolean sendMessage(String recip, String subj, String msg) {
		try {		
			Runtime rt = Runtime.getRuntime();
			Process pr = rt.exec("mail -tw " + recip);
		  	OutputStreamWriter out = new OutputStreamWriter(pr.getOutputStream());
			out.write("Subject: " + subj + "\n");
			out.write(msg);
			out.flush();
			out.close();
			return true;
		}
		catch (Exception e) {
			System.out.println("An exception occurred while sending message: " + e);
			e.printStackTrace();
			return false;
		}
	}


}

Process pr = rt.exec("mail -s " + recip);

mail -s "Some subject line" test@yahoo.com