How to timeout when reading from a URL ?

Question

I have the following method that gets html from a URL :
StringBuffer Read_From_Url(String URL_Or_File_Path,boolean Print_Stack_Trace)
    StringBuffer sb=new StringBuffer();
    BufferedReader in=null;
    try
        in=new BufferedReader(new InputStreamReader(new URL(URL_Or_File_Path).openStream()));
        String inputLine;
        while ((inputLine=in.readLine()) != null) sb.append(inputLine+"\n");
        in.close();
    catch (Exception e) { if (Print_Stack_Trace) e.printStackTrace(); }
    finally
      try
        if (in!=null)
          in.close();
          in=null;
      catch (Exception ex) { if (Print_Stack_Trace) ex.printStackTrace(); }
    return sb;
  }It usually works fine, but for for some urls, it will be stuck forever, for instance try this one : www.conform.com.cn
I tried to read that url from a browser, it will keep the browser in the fetch mode forever, never return a page.
My question is : how to tell my method to timeout after 30 seconds if it can't get anything from that url ?
Frank

Answer 1

If you RTFM, you will see
http://java.sun.com/javase/6/docs/api/java/net/URLConnection.html#setReadTimeout(int)
there's also one for ConnectTimeout
Also, I have created a class called Timeout that calls a TimeOutCmd after the alloted time has expired. Generally, my timeout command is to close the stream I'm waiting on, which will release the thread and cause an IOException
package tjacobs.io;
public class TimeOut implements Runnable {
     private long mWaitTime;
     private boolean mRunning = true;
     private Thread mMyThread;
     private TimeOutCmd mTimeOutCmd;
     public static final int DEFAULT_WAIT_TIME = 30 * 1000; // 30 Seconds
     public static final int NO_TIMEOUT = -1;
     public static interface TimeOutCmd {
          public void timeOut();
     public TimeOut(TimeOutCmd cmd) {
          this(cmd, DEFAULT_WAIT_TIME);
     public TimeOut(TimeOutCmd cmd, int timeToWait) {
          mWaitTime = timeToWait;
          mTimeOutCmd = cmd;
     public void stop() {
          mRunning = false;
          mTimeOutCmd.timeOut();
          if (mMyThread != null) mMyThread.interrupt();
      * reset the TimeOut
     public void tick() {
          if (mMyThread != null)
               mMyThread.interrupt();
     public void run () {
          mMyThread = Thread.currentThread();
          while (true) {
               try {
                    Thread.sleep(mWaitTime);
                    stop();
               catch (InterruptedException ex) {
                    if (!mRunning) {
                         return;
}