servermidlet2.java

这是郭克华老师的J2ME视频的源代码

package prj20_1;

import javax.microedition.io.Connector;
import javax.microedition.io.Datagram;
import javax.microedition.io.UDPDatagramConnection;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;

public class ServerMIDlet2 extends MIDlet {
	private final int MAX = 255;
	protected void startApp() throws MIDletStateChangeException {
		try{
			//监听端口
			UDPDatagramConnection udc = 
				(UDPDatagramConnection)Connector.open("datagram://:9999");
			//接受数据报
			Datagram dg = udc.newDatagram(MAX);
			udc.receive(dg);
			byte[] data = dg.getData();
			System.out.println(new String(data,0,dg.getLength()));

		}catch(Exception ex){
			ex.printStackTrace();
		}


	}

	protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
		// TODO Auto-generated method stub

	}

	protected void pauseApp() {
		// TODO Auto-generated method stub

	}



}