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package utility.structure;
import java.util.Collection;
import java.util.ConcurrentModificationException;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
import java.util.NoSuchElementException;
public class LinkedList<E> implements List<E>{
private int size = 0;
private int modCount = 0;
private Entry head = new Entry(null);

public LinkedList() {

head.next = head;

head.previous = head;
}
public boolean add(E e) {

addBefore(e, head);

return true;
}
public void add(int index, E element) {

addBefore(element,(index == size ? head :entry(index)));

}
public boolean addAll(Collection<? extends E> c) {

for (E e : c)
add(e);

return true;
}
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