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1: /* CharToInt.java - Copyright (c) 2005 by Stefan Thesing 2: <p>This file is part of Webdings Tools.</p> 3: <p>Webdings Tools is free software; you can redistribute it and/or modify 4: it under the terms of the GNU General Public License as published by 5: the Free Software Foundation; either version 2 of the License, or 6: (at your option) any later version.</p> 7: <p>Webdings Tools is distributed in the hope that it will be useful, 8: but WITHOUT ANY WARRANTY; without even the implied warranty of 9: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10: GNU General Public License for more details.</p> 11: <p>You should have received a copy of the GNU General Public License 12: along with Webdings Tools; if not, write to the<br> 13: Free Software Foundation, Inc.,<br> 14: 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA<br> 15: */ 16: package de.webdings.tools; 17: 18: /** 19: * CharToInt is used to convert textual represenations 20: * of integer numbers into primitive data type int. 21: * 22: * @author Stefan Thesing<br> 23: * Website: <a href="http://www.webdings.de">http://www.webdings.de</a> 24: * @version 1.0.1 10.08.2005 25: */ 26: public class CharToInt { 27: /** 28: * @param c A char representation of an int number 29: * @return int value of the represented number 30: * @throws NumberFormatException 31: * @throws Exception if c is not a number character. 32: */ 33: public static int convert(char c) throws NumberFormatException 34: { 35: int ascii_wert = c; 36: if(ascii_wert<48 || ascii_wert>57) { 37: throw new NumberFormatException("Error: " + c + "is not a number!"); 38: } else { 39: return ascii_wert-48; 40: } 41: } 42: 43: /** 44: * @param s A char array representation of an int number 45: * @return int value of the represented number 46: * @throws NumberFormatException 47: * @throws Exception if s contains a non-number character. 48: */ 49: public static int convert(char[] s) throws NumberFormatException 50: { 51: int i; 52: int ergebnis = 0; 53: for(i=0;i<s.length;++i) { 54: ergebnis = ergebnis*10 + convert(s[i]); 55: } 56: return ergebnis; 57: } 58: 59: /** 60: * @param s A String representation of an int number 61: * @return int value of the represented number 62: * @throws NumberFormatException 63: * @throws Exception if s contains a non-number character. 64: */ 65: public static int convert(String s) throws NumberFormatException 66: { 67: return convert(s.toCharArray()); 68: } 69: 70: /** 71: * @param s A StringBuffer representation of an int number 72: * @return int value of the represented number 73: * @throws NumberFormatException 74: * @throws Exception if s contains a non-number character. 75: */ 76: public static int convert(StringBuffer s) throws NumberFormatException 77: { 78: return convert(new String(s)); 79: } 80: }
Webdings Tools (1.0.1) |
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