import java.io.File;

 import java.text.ParseException;

 import java.text.SimpleDateFormat;

 import java.util.Date;

 import java.util.Timer;

 import java.util.TimerTask;

 /*

  * ：在指定的时间删除指定目录

  * 设置为一个计时任务

  */

 public class TimerTest {

     public static void main(String[] args) throws Exception {

         Timer t = new Timer();

         String s = "2016-04-09 20:46:59";

         SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

         Date d = sdf.parse(s);

         t.schedule(new DeleteFolder(), d);

     }

 }

 class DeleteFolder extends TimerTask {

     @Override

     public void run() {

         File srcFolder = new File("demo");

         deleteFolder(srcFolder);

     }

     private void deleteFolder(File srcFolder) {

         File[] fileArr = srcFolder.listFiles();

         if (fileArr != null) {

             for (File file : fileArr) {

                 if (file.isDirectory()) {

                     deleteFolder(file);

                 } else {

                     file.delete();

                 }

             }

         }

         // 该语句用于当文件夹已经为空时，直接将文件夹删除。

43         srcFolder.delete();

     }

 }