/*
* Copyright (c) 1997, 2001, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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package javax.swing;
import javax.swing.event.ListDataListener;
/**
* This interface defines the methods components like JList use
* to get the value of each cell in a list and the length of the list.
* Logically the model is a vector, indices vary from 0 to
* ListDataModel.getSize() - 1. Any change to the contents or
* length of the data model must be reported to all of the
* ListDataListeners.
*
* @param <E> the type of the elements of this model
*
* @author Hans Muller
* @see JList
*/
public interface ListModel<E>
{
/**
* Returns the length of the list.
* @return the length of the list
*/
int getSize();
/**
* Returns the value at the specified index.
* @param index the requested index
* @return the value at <code>index</code>
*/
E getElementAt(int index);
/**
* Adds a listener to the list that's notified each time a change
* to the data model occurs.
* @param l the <code>ListDataListener</code> to be added
*/
void addListDataListener(ListDataListener l);
/**
* Removes a listener from the list that's notified each time a
* change to the data model occurs.
* @param l the <code>ListDataListener</code> to be removed
*/
void removeListDataListener(ListDataListener l);
}