Java通过关闭Socket终止线程

package Threads;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.net.Socket;/** * Created by Frank */public class StopClose extends Thread {  protected Socket io;  public void run() {    try {      io = new Socket("java.sun.com", 80);      BufferedReader is = new BufferedReader(new InputStreamReader(io.getInputStream()));      System.out.println("StopClose reading");      /**       * 死锁，因为读取响应之前，HTTP责成客户端发送一个请求（像GET/HTTP/1.0）和一个空行       */      String line = is.readLine();      /**       * 所以我们永远不可能到达这里       */      System.out.printf("StopClose FINISHED after reading %s!", line);    } catch (IOException ex) {      System.out.println("StopClose terminating:" + ex);    }  }  public void shutDown() throws IOException {    if (io != null) {      synchronized (io) {        io.close();      }    }    System.out.println("StopClose.shutDown() complete");  }  public static void main(String[] args) throws InterruptedException, IOException {    StopClose t = new StopClose();    t.start();    sleep(1000*5);    t.shutDown();  }}