/* RandomAccess.java -- A tagging interface that lists can use to tailor
   operations to the correct algorithm
   Copyright (C) 2001, 2005  Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
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any later version.

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02110-1301 USA.

Linking this library statically or dynamically with other modules is
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permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
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package java.util;

/**
 * Marker interface used to inform <code>List</code> implementations that
 * they support fast (usually constant time) random access. This allows
 * generic list algorithms to tailor their behavior based on the list
 * type.
 * <p>
 *
 * For example, some sorts are n*log(n) on an array, but decay to quadratic
 * time on a linked list.  As a rule of thumb, this interface should be
 * used is this loop:<br>
 * <code>for (int i = 0, n = list.size(); i &lt; n; i++) list.get(i);</code>
 * <br>runs faster than this loop:<br>
 * <code>for (Iterator i = list.iterator(); i.hasNext(); ) i.next();</code>
 *
 * @author Eric Blake (ebb9@email.byu.edu)
 * @see List
 * @since 1.4
 * @status updated to 1.4
 */
public interface RandomAccess
{
  // Tagging interface only.
}