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Diffstat (limited to 'libjava/classpath/java/util/RandomAccess.java')
-rw-r--r-- | libjava/classpath/java/util/RandomAccess.java | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/libjava/classpath/java/util/RandomAccess.java b/libjava/classpath/java/util/RandomAccess.java new file mode 100644 index 00000000000..054266a1c74 --- /dev/null +++ b/libjava/classpath/java/util/RandomAccess.java @@ -0,0 +1,64 @@ +/* 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 +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +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 < 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. +} |