//SMSRepeatSend.java	2004/03/25//該程序可以循環發送文本信息import javax.microedition.midlet.*;import javax.microedition.io.*;import javax.microedition.lcdui.*;import javax.wireless.messaging.*;import java.io.IOException;public class SMSRepeatSend extends MIDlet implements CommandListener, Runnable {    Command exitCommand  = new Command("Exit", Command.EXIT, 1);    Command okCommand = new Command("OK", Command.OK, 1);    Command backCommand = new Command("Back", Command.BACK, 2);    Command sendCommand = new Command( "Send", Command.OK, 2 );    Display display;    String smsPort;    TextBox destAddrBox;    TextBox destPortBox;    Alert errorMsgAlert;    Alert infoAlert;    Displayable resumeScreen = null;    String addr;    int REPEATNUM = 50;    int count = 0;//計數器    String data = "Hello? sending message test";    Thread th;    Thread tempth;    Form sendForm;//顯示發送的內容    SendThread sender;               public SMSRepeatSend()     {                display = Display.getDisplay(this);        destAddrBox = new TextBox("Destination Address?", null, 256, TextField.PHONENUMBER);        destAddrBox.addCommand(exitCommand);        destAddrBox.addCommand(okCommand);        destAddrBox.setCommandListener(this);                destPortBox = new TextBox( "Input Port(16000-17000)", null, 256, TextField.PHONENUMBER );        destPortBox.addCommand( backCommand );        destPortBox.addCommand( sendCommand );        destPortBox.setCommandListener( this );                sendForm = new Form( "Sending Window" );        sendForm.addCommand( backCommand );        sendForm.setCommandListener( this );                infoAlert = new Alert( "SMS Send", "Message sending finished", null, AlertType.INFO );        infoAlert.setTimeout( 2000 );                errorMsgAlert = new Alert("SMS Error Message", null, null, AlertType.ERROR);        errorMsgAlert.setTimeout(5000);                 resumeScreen = destAddrBox;    }        public void startApp()     {        display.setCurrent(resumeScreen);    }        public void pauseApp() {        resumeScreen = display.getCurrent();    }        public void destroyApp(boolean unconditional)     {    	th = null;	    }        public void commandAction(Command c, Displayable s)     {        try {            if (c == exitCommand || c == Alert.DISMISS_COMMAND)             {                destroyApp(false);                notifyDestroyed();            }            else                 if (c == okCommand)             	    display.setCurrent( destPortBox );            	else             	    if( c==backCommand )            	    {            	    	count = 0;//重新計數            	    	sendForm.deleteAll();            	    	display.setCurrent( destAddrBox );            	    }            	    else            	        if ( c==sendCommand )            	            {            	            	addr = destAddrBox.getString();    				if ( !SMSRepeatSend.isValidPhoneNumber( addr ) )    				{    					errorMsgAlert.setString( "Invalid phone number" );    					display.setCurrent( errorMsgAlert, destAddrBox );    				}    	    				smsPort = destPortBox.getString();    				String tmpstr = "Send to +" + addr + "://:" + smsPort;    				sendForm.append( tmpstr );    				display.setCurrent( sendForm );    				//循環發送短信            	            	Thread th = new Thread(this);            	            	th.start();            	            }            } catch (Exception ex)         {            ex.printStackTrace();        }    }                private static boolean isValidPhoneNumber(String number)     {        char[] chars = number.toCharArray();        if (chars.length == 0) {            return false;        }        int startPos = 0;        // initial '+' is OK        if (chars[0]=='+') {            startPos = 1;        }        for (int i = startPos; i < chars.length; ++i) {            if (!Character.isDigit(chars[i])) {                return false;            }        }        return true;    }            public void run()    {    	sender = new SendThread();    	sender.start();//先啟動一個線程，去發送短信，然后等它結束后再去啟動另一個線程    	    	for ( int i=0; i<REPEATNUM-1; i++ )    	{           	   	try{    			sender.join();//等待當前發送短信的線程結束    		}catch ( InterruptedException ie )    		{	    		ie.printStackTrace();	    	}    		sender = new SendThread();    		sender.start();     	    	}    	    	display.setCurrent( infoAlert );    }        class SendThread extends Thread    {    	public void run()    	{   	   	count++;		String destAddr = "sms://" + addr + ":" + smsPort;		MessageConnection smsconn = null;		    		try {	    		smsconn = (MessageConnection)Connector.open( destAddr );	    		    			TextMessage textmessage = (TextMessage)smsconn.newMessage( MessageConnection.TEXT_MESSAGE );			textmessage.setAddress( destAddr );   			String content = count + "---" + data ;    			textmessage.setPayloadText( content );//文本內容    				    			    			sendForm.append( content );    			smsconn.send( textmessage );    		} catch ( Throwable t )    		{			System.out.println( "Send caught:");    			t.printStackTrace();    		}    			if ( smsconn!=null )		{		//	System.out.println( count + "-----closed" );			try {	    			smsconn.close();			}catch ( IOException ioe )    			{				System.out.println( "Closing connection caught:" );    				ioe.printStackTrace();    			}    		}    	}        }}