?? concreteiterator.java
字號:
package com.javapatterns.iterator.whitebox;
public class ConcreteIterator implements Iterator
{
private ConcreteAggregate agg;
private int index = 0;
private int size = 0;
public ConcreteIterator(ConcreteAggregate agg)
{
this.agg = agg;
size = agg.size();
index = 0;
}
public void first()
{
index = 0;
}
public void next()
{
if (index < size)
{
index++;
}
}
public boolean isDone()
{
return (index >= size);
}
public Object currentItem()
{
return agg.getElement(index);
}
}
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