checking long running task and timing out using java thread

public boolean checkInBackground() throws InterruptedException {
  final StringBuffer st = new StringBuffer();
  Thread thread = new Thread() {
   public void run() {
    try {
     check();
     st.append("done");
    } catch (Exception e) {
     e.printStackTrace();
    }
   }

   public void check() {
    //long running task
    while(true) {}
   };
  };
  thread.setDaemon(true);
  thread.start();
  thread.join(2 * 1000);
  if (st.toString().equals("done")) {
   return true;
  }
  return false;
 }