How to use

poll

method

in

jsr166y.LinkedTransferQueue

/**
 * @throws NullPointerException     {@inheritDoc}
 * @throws IllegalArgumentException {@inheritDoc}
 */
public int drainTo(Collection<? super E> c) {
  if (c == null)
    throw new NullPointerException();
  if (c == this)
    throw new IllegalArgumentException();
  int n = 0;
  for (E e; (e = poll()) != null;) {
    c.add(e);
    ++n;
  }
  return n;
}

/**
 * @throws NullPointerException     {@inheritDoc}
 * @throws IllegalArgumentException {@inheritDoc}
 */
public int drainTo(Collection<? super E> c, int maxElements) {
  if (c == null)
    throw new NullPointerException();
  if (c == this)
    throw new IllegalArgumentException();
  int n = 0;
  for (E e; n < maxElements && (e = poll()) != null;) {
    c.add(e);
    ++n;
  }
  return n;
}

/**
 * @throws NullPointerException     {@inheritDoc}
 * @throws IllegalArgumentException {@inheritDoc}
 */
public int drainTo(Collection<? super E> c, int maxElements) {
  if (c == null)
    throw new NullPointerException();
  if (c == this)
    throw new IllegalArgumentException();
  int n = 0;
  E e;
  while (n < maxElements && (e = poll()) != null) {
    c.add(e);
    ++n;
  }
  return n;
}

/**
 * @throws NullPointerException     {@inheritDoc}
 * @throws IllegalArgumentException {@inheritDoc}
 */
public int drainTo(Collection<? super E> c) {
  if (c == null)
    throw new NullPointerException();
  if (c == this)
    throw new IllegalArgumentException();
  int n = 0;
  E e;
  while ( (e = poll()) != null) {
    c.add(e);
    ++n;
  }
  return n;
}

  @Override
  public void run() {
    for (; ; ) {
      // try {
      if (queue.poll() != null) {
        takeCount++;
      }
      // } catch (InterruptedException e) {
      // e.printStackTrace();
      // }
      // try {
      // Thread.sleep(10L);
      // } catch (InterruptedException e) {
      // 
      // e.printStackTrace();
      // }
    }
  }
}.start();