POSE3_06_Generics/src/ChainQueue.java

import java.util.Collection;
import java.util.Iterator;
import java.util.Queue;


public class ChainQueue<E> implements Queue<E> {

    private class Node<E> {

        E data;
        Node<E> next;

        public Node(E data) {
            this.data = data;
        }

    }

    Node<E> first;

    @Override
    public boolean add(E arg0) {
        if (first == null) {
            first = new Node(arg0);
        }
        return addNode(arg0, first);

    }

    private boolean addNode(E arg, Node n) {
        if (n == null) {
            n = new Node(arg);
        }
        if (n.next == null) {
            n.next = new Node(arg);
        }
        return true;

    }

    @Override
    public int size() {
        return 0;
    }

    @Override
    public boolean isEmpty() {
        return false;
    }

    @Override
    public boolean contains(Object o) {
        return false;
    }

    @Override
    public Iterator<E> iterator() {
        return null;
    }

    @Override
    public Object[] toArray() {
        return new Object[0];
    }

    @Override
    public <T> T[] toArray(T[] ts) {
        return null;
    }

    @Override
    public boolean remove(Object o) {
        return false;
    }

    @Override
    public boolean containsAll(Collection<?> collection) {
        return false;
    }

    @Override
    public boolean addAll(Collection<? extends E> collection) {
        return false;
    }

    @Override
    public boolean removeAll(Collection<?> collection) {
        return false;
    }

    @Override
    public boolean retainAll(Collection<?> collection) {
        return false;
    }

    @Override
    public void clear() {

    }

    @Override
    public boolean offer(E e) {
        return false;
    }

    @Override
    public E remove() {
        return null;
    }

    @Override
    public E poll() {
        return null;
    }

    @Override
    public E element() {
        return null;
    }

    @Override
    public E peek() {
        return null;
    }

}