vecterator.java

《Java与模式》一书的源代码

package com.javapatterns.iterator.vecterator1;

import java.util.Iterator;
import java.util.NoSuchElementException;
import java.util.Vector;

public class Vecterator implements Iterator
{
    private Vector iteratee;
    private int count;

    public Vecterator(Vector v)
    {
        iteratee = v;
        count = 0;
    }

    public boolean hasNext()
    {
        return count < iteratee.size();
    }

    public Object next()
    {
        synchronized(iteratee)
        {
            if (count < iteratee.size())
            {
                return iteratee.elementAt(count++);
            }
        }
        throw new NoSuchElementException("VectorIterator");
    }

    public void remove()
    {
        throw new UnsupportedOperationException();
    }
}