DelayQueue poll(long timeout, TimeUnit unit) not working

Question

Im trying to test out using a DelayQueue but the poll method dosen't seem to be working properly. The docs say...
E poll(long timeout, TimeUnit unit)
Retrieves and removes the head of this queue, waiting if necessary up to the specified wait time if no elements with an unexpired delay are present on this queue.
The specified wait time is one second and the elements are delayed a lot longer than that.
Also my last if statement within the compareTo() method. What can I do to fix it? I had to add in the last return because I guess all the above return's are within conditional statements. Thanks.
import java.util.concurrent.Delayed;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.DelayQueue;
public class DelayTest{
public static void main(String[] args){
  DelayQueue<DelayedElement> dq = new DelayQueue<DelayedElement>();
  dq.put(new DelayedElement(10));
  dq.put(new DelayedElement(20));
  dq.put(new DelayedElement(5));
try{
  DelayedElement de = dq.take();
  //DelayedElement de = dq.poll(1, TimeUnit.SECONDS);
  // System.out.println(de.getDelayTime());
}catch(InterruptedException ie){
  System.err.println(ie);
class DelayedElement implements Delayed, Comparable<Delayed>{
private long delay;
public long getDelay(TimeUnit unit){
long d = unit.convert(delay - (System.currentTimeMillis() / 1000), TimeUnit.SECONDS);
  System.out.println(delay);
  return delay;
public DelayedElement(long delay){
  this.delay = delay;
public long getDelayTime(){
    return delay;
public int compareTo(Delayed other){
  if(other == this)
   return 0;
   DelayedElement x = (DelayedElement)other;
   long diff = delay - x.delay;
   if(diff < 0)
    return -1;
   else if (diff > 0)
    return 1;
    return 1;
}

Answer 1

Scrap that last question. I made some mods to the code and I switched to using take() which blocks. Problem is that take() is blocking forever. Can anyone see what I am doing wrong?
import java.util.concurrent.Delayed;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.DelayQueue;
public class DelayTest{
public static void main(String[] args){
  DelayQueue<DelayedElement> dq = new DelayQueue<DelayedElement>();
  dq.put(new DelayedElement(10));
  dq.put(new DelayedElement(20));
  dq.put(new DelayedElement(5));
while(true){
  try{ 
  // DelayedElement de = dq.poll(); // if this queue has no elements with an unexpired delay no blocking  
   DelayedElement de = dq.take(); // waits for an expired element then remove head of queue
   if(de == null) break;
    System.out.println(de.getDelayTime());
   }catch(InterruptedException ie){
   System.err.println(ie);
class DelayedElement implements Delayed, Comparable<Delayed>{
private long delay;
public long getDelay(TimeUnit unit){
  long d = unit.convert(delay, TimeUnit.MILLISECONDS);
  return d;
public DelayedElement(long delay){
  this.delay = delay;
public long getDelayTime(){
  return delay;
public int compareTo(Delayed other){
  if(other == this)
   return 0;
   DelayedElement x = (DelayedElement)other;
   long diff = delay - x.delay;
   if(diff < 0){
    return -1;
    return 1;  // diff > 0
}