Class AbstractDeque

classpath/java/util/AbstractDeque.java:13–90

package java.util;

public abstract class AbstractDeque<T> extends AbstractQueue<T> 
                                       implements Deque<T> {

  @Override
  public void push(T e) {
    addFirst(e);
  }
  
  @Override
  public void addLast(T element) {
    if (! offerLast(element)) {
      throw new IllegalStateException();
    }
  }

  @Override
  public void addFirst(T element) {
    if (! offerFirst(element)) {
      throw new IllegalStateException();
    }
  }

  @Override
  public boolean offer(T element) {
    return offerLast(element);
  }

  @Override
  public T poll() {
    return pollFirst();
  }

  @Override
  public T pop() {
    return removeFirst();
  }

  @Override
  public T removeFirst() {
    return remove();
  }

  @Override
  public boolean remove(Object element) {
    return removeFirstOccurrence(element);
  }

  @Override
  public T removeLast() {
    T result = pollLast();
    if (result == null) {
      throw new NoSuchElementException();
    } else {
      return result;
    }
  }

  @Override