| 1 | /* Stack.java - Class that provides a Last In First Out (LIFO)
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| 2 | datatype, known more commonly as a Stack
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| 3 | Copyright (C) 1998, 1999, 2001 Free Software Foundation, Inc.
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| 4 |
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| 5 | This file is part of GNU Classpath.
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| 6 |
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| 7 | GNU Classpath is free software; you can redistribute it and/or modify
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| 8 | it under the terms of the GNU General Public License as published by
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| 9 | the Free Software Foundation; either version 2, or (at your option)
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| 10 | any later version.
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| 11 |
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| 12 | GNU Classpath is distributed in the hope that it will be useful, but
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| 13 | WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 15 | General Public License for more details.
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| 16 |
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| 17 | You should have received a copy of the GNU General Public License
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| 18 | along with GNU Classpath; see the file COPYING. If not, write to the
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| 19 | Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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| 20 | 02111-1307 USA.
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| 21 |
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| 22 | Linking this library statically or dynamically with other modules is
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| 23 | making a combined work based on this library. Thus, the terms and
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| 24 | conditions of the GNU General Public License cover the whole
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| 25 | combination.
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| 26 |
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| 27 | As a special exception, the copyright holders of this library give you
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| 28 | permission to link this library with independent modules to produce an
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| 29 | executable, regardless of the license terms of these independent
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| 30 | modules, and to copy and distribute the resulting executable under
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| 31 | terms of your choice, provided that you also meet, for each linked
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| 32 | independent module, the terms and conditions of the license of that
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| 33 | module. An independent module is a module which is not derived from
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| 34 | or based on this library. If you modify this library, you may extend
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| 35 | this exception to your version of the library, but you are not
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| 36 | obligated to do so. If you do not wish to do so, delete this
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| 37 | exception statement from your version. */
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| 38 |
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| 39 |
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| 40 | package java.util;
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| 41 |
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| 42 | /* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
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| 43 | * "The Java Language Specification", ISBN 0-201-63451-1
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| 44 | * plus online API docs for JDK 1.2 beta from http://www.javasoft.com.
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| 45 | * Status: Believed complete and correct
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| 46 |
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| 47 | /**
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| 48 | * Stack provides a Last In First Out (LIFO) data type, commonly known
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| 49 | * as a Stack. Stack itself extends Vector and provides the additional
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| 50 | * methods for stack manipulation (push, pop, peek). You can also seek for
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| 51 | * the 1-based position of an element on the stack.
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| 52 | *
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| 53 | * @author Warren Levy <[email protected]>
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| 54 | * @author Eric Blake <[email protected]>
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| 55 | * @see List
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| 56 | * @see AbstractList
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| 57 | * @see LinkedList
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| 58 | * @since 1.0
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| 59 | * @status updated to 1.4
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| 60 | */
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| 61 | public class Stack extends Vector
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| 62 | {
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| 63 | // We could use Vector methods internally for the following methods,
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| 64 | // but have used Vector fields directly for efficiency (i.e. this
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