import java.io.File;import java.text.SimpleDateFormat;import java.util.Timer;import java.util.TimerTask;public class FileListener {    public static void main(String[] args) {        FileListener fileListener = new FileListener();        fileListener.timer = new Timer(true);        fileListener.start();    }    private Timer timer;    private long currentTime = -1;    private long lastModifiedTime = -1;    private long times = 1;    private long pollingInterval = 1000 * times;    private String filePath = "c:\\test.txt";    public FileListener() {        File file = new File(filePath);        lastModifiedTime = file.lastModified();        currentTime = lastModifiedTime;    }    public void start() {        timer.schedule(new FileMonitor(), 0, pollingInterval);        while (true) {            try {                int ch = System.in.read();                System.out.println("ch=" + ch);                if (ch - 'c' == 0) {                    System.out.println("quit");                    timer.cancel();                    break;                }            } catch (Exception e) {                e.printStackTrace();            }        }    }    private class FileMonitor extends TimerTask {        public void run() {            File file = new File(filePath);            lastModifiedTime = file.exists() ? file.lastModified() : -1;            if (currentTime != lastModifiedTime) {
   //1439540671443                String string = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss SSS")                        .format(lastModifiedTime);//1439540994156                System.out.println("File changed At:" + string);                currentTime = lastModifiedTime;            }        }    }}