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Java > Open Source Codes > JFlex > IntPair


1 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
2  * JFlex 1.4.1 *
3  * Copyright (C) 1998-2004 Gerwin Klein <lsf@jflex.de> *
4  * All rights reserved. *
5  * *
6  * This program is free software; you can redistribute it and/or modify *
7  * it under the terms of the GNU General Public License. See the file *
8  * COPYRIGHT for more information. *
9  * *
10  * This program is distributed in the hope that it will be useful, *
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13  * GNU General Public License for more details. *
14  * *
15  * You should have received a copy of the GNU General Public License along *
16  * with this program; if not, write to the Free Software Foundation, Inc., *
17  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
18  * *
19  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
20
21 package JFlex;
22
23
24 /**
25  * Simple pair of integers.
26  *
27  * Used in NFA to represent a partial NFA by its start and end state.
28  *
29  * @author Gerwin Klein
30  * @version JFlex 1.4.1, $Revision: 2.2 $, $Date: 2004/11/06 23:03:32 $
31  */
32 final class IntPair {
33
34   int start;
35   int end;
36   
37   IntPair(int start, int end) {
38     this.start = start;
39     this.end = end;
40   }
41
42   public int hashCode() {
43     return end + (start << 8);
44   }
45   
46   public boolean equals(Object JavaDoc o) {
47     if ( o instanceof IntPair ) {
48       IntPair p = (IntPair) o;
49       return start == p.start && end == p.end;
50     }
51     return false;
52   }
53   
54   public String JavaDoc toString() {
55     return "("+start+","+end+")";
56   }
57 }
58
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