Source code: javatools/swing/NumericTCChecker.java
1 /*
2 * NumericTCChecker.java
3 *
4 * Created on 29 gennaio 2002, 19.38
5 Javatools (modified version) - Some useful general classes.
6 Copyright (C) 2002-2003 Chris Bitmead (original) Antonio Petrelli (modified)
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21
22 Contact me at: brenmcguire@users.sourceforge.net
23 */
24
25 package javatools.swing;
26
27 /**
28 * Checks if a text component contains a numeric value.
29 * @author Antonio Petrelli
30 * @version 0.0.1
31 */
32 public class NumericTCChecker extends javatools.swing.TextComponentChecker {
33
34 /** Creates new NumericTCChecker */
35 public NumericTCChecker() {
36 }
37
38 /** Checks if the component contains a numeric value.
39 * @return <CODE>true</CODE>: the value is valid;
40 * <CODE>false</CODE>: the value is not valid.
41 */
42 public boolean isValid() {
43 String gotText;
44 int tempNum;
45 boolean retValue;
46
47 gotText = getText();
48 if (gotText != null) {
49 retValue = true;
50 try {
51 tempNum = Integer.parseInt(getText());
52 }
53 catch (NumberFormatException e) {
54 retValue = false;
55 }
56 }
57 else
58 retValue = false;
59 return retValue;
60 }
61
62 }