54 lines
2.0 KiB
Java
54 lines
2.0 KiB
Java
/* 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 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., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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As a special exception, if you link this library with other files to
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produce an executable, this library does not by itself cause the
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resulting executable to be covered by the GNU General Public License.
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This exception does not however invalidate any other reasons why the
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executable file might be covered by the GNU General Public License. */
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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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