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65 lines
2.6 KiB
Java
65 lines
2.6 KiB
Java
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/* RandomAccess.java -- A tagging interface that lists can use to tailor
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operations to the correct algorithm
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Copyright (C) 2001, 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.util;
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/**
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* Marker interface used to inform <code>List</code> implementations that
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* they support fast (usually constant time) random access. This allows
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* generic list algorithms to tailor their behavior based on the list
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* type.
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* <p>
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*
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* For example, some sorts are n*log(n) on an array, but decay to quadratic
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* time on a linked list. As a rule of thumb, this interface should be
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* used is this loop:<br>
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* <code>for (int i = 0, n = list.size(); i < n; i++) list.get(i);</code>
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* <br>runs faster than this loop:<br>
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* <code>for (Iterator i = list.iterator(); i.hasNext(); ) i.next();</code>
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*
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* @author Eric Blake (ebb9@email.byu.edu)
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* @see List
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* @since 1.4
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* @status updated to 1.4
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*/
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public interface RandomAccess
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{
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// Tagging interface only.
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}
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