import java.util.Iterator;
import java.util.LinkedList;

public class HashMap {
    LinkedList<HashEntry>[] tab;
    Iterator iter;

    class HashEntry{
        public Object key, value;
    }

    class MyHashMapIterator implements Iterator{
        int i;

        public MyHashMapIterator(){
            while(i<tab.length){
                if(tab[i] == null)
                    continue;
                return;
            }
        }

        @Override
        public boolean hasNext() {
            if(i >= tab.length)
                return false;
        }

        @Override
        public Object next() {
        }
    }
    public static void main(String[] args) {

    }
}