1 /*
2 * CharacterCounter
3 * Copyright (C) 2008 Christian Schenk
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
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
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
18 */
19 package org.christianschenk.cc.util;
20
21 import java.util.Iterator;
22
23 /**
24 * Iterates the characters of a given string.
25 *
26 * @author Christian Schenk
27 */
28 public class StringIterator implements Iterable<Character> {
29
30 private final String string;
31
32 public StringIterator(final String string) {
33 this.string = string;
34 }
35
36 public Iterator<Character> iterator() {
37 return new Iterator<Character>() {
38 private int position = 0;
39
40 public boolean hasNext() {
41 return (this.position < string.length());
42 }
43
44 public Character next() {
45 if (this.position >= string.length()) return null; // for dummies
46 return string.charAt(this.position++);
47 }
48
49 public void remove() {
50 throw new UnsupportedOperationException();
51 }
52 };
53 }
54 }