人民邮电出版社的《J2ME手机开发入门》全部源代码

				/*
				 * Sender.java
				 *
				 * Created on 2005年5月5日, 下午2:39
				 */
				
				import javax.microedition.midlet.*;
				import javax.microedition.io.*;
				import javax.microedition.lcdui.*;
				import java.io.*;
				
				public class Sender extends Thread {
				
				    private OutputStream os;
				    private String message;
				    boolean stopFlag;
				
				    public Sender(OutputStream os) {
				        this.os = os;
				        stopFlag = false;
				        start();
				    }
				
				    public synchronized void send(String msg) {
				        message = msg;
				        notify();
				    }
				
				    public synchronized void run() {
				        while (!stopFlag) {
				            if (message == null) {
				                try {
				                    wait();
				                } catch (InterruptedException e) {
				                }
				            }
				
				            if (message == null) {
				                break;
				            }
				
				            try {
				                os.write(message.getBytes());
				                os.write("\r\n".getBytes());
				            } catch (IOException ioe) {
				                ioe.printStackTrace();
				            }
				            message = null;
				        }
				    }
				
				    public synchronized void stop() {
				        message = null;
				        notify();
				    }
				}