Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * jPOS Project [http://jpos.org]
 * Copyright (C) 2000-2012 Alejandro P. Revilla
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

public class Main {
    /**
     * Converts a String to an integer of base radix.
     * <br><br>
     * String constraints are:
     * <li>Number must be less than 10 digits</li>
     * <li>Number must be positive</li>
     * @param s String representation of number
     * @param radix Number base to use
     * @return integer value of number
     * @throws NumberFormatException
     */
    public static int parseInt(String s, int radix) throws NumberFormatException {
        int length = s.length();
        if (length > 9)
            throw new NumberFormatException("Number can have maximum 9 digits");
        int result = 0;
        int index = 0;
        int digit = Character.digit(s.charAt(index++), radix);
        if (digit == -1)
            throw new NumberFormatException("String contains non-digit");
        result = digit;
        while (index < length) {
            result *= radix;
            digit = Character.digit(s.charAt(index++), radix);
            if (digit == -1)
                throw new NumberFormatException("String contains non-digit");
            result += digit;
        }
        return result;
    }

    /**
     * Converts a String to an integer of radix 10.
     * <br><br>
     * String constraints are:
     * <li>Number must be less than 10 digits</li>
     * <li>Number must be positive</li>
     * @param s String representation of number
     * @return integer value of number
     * @throws NumberFormatException
     */
    public static int parseInt(String s) throws NumberFormatException {
        return parseInt(s, 10);
    }

    /**
     * Converts a character array to an integer of base radix.
     * <br><br>
     * Array constraints are:
     * <li>Number must be less than 10 digits</li>
     * <li>Number must be positive</li>
     * @param cArray Character Array representation of number
     * @param radix Number base to use
     * @return integer value of number
     * @throws NumberFormatException
     */
    public static int parseInt(char[] cArray, int radix) throws NumberFormatException {
        int length = cArray.length;
        if (length > 9)
            throw new NumberFormatException("Number can have maximum 9 digits");
        int result = 0;
        int index = 0;
        int digit = Character.digit(cArray[index++], radix);
        if (digit == -1)
            throw new NumberFormatException("Char array contains non-digit");
        result = digit;
        while (index < length) {
            result *= radix;
            digit = Character.digit(cArray[index++], radix);
            if (digit == -1)
                throw new NumberFormatException("Char array contains non-digit");
            result += digit;
        }
        return result;
    }

    /**
     * Converts a character array to an integer of radix 10.
     * <br><br>
     * Array constraints are:
     * <li>Number must be less than 10 digits</li>
     * <li>Number must be positive</li>
     * @param cArray Character Array representation of number
     * @return integer value of number
     * @throws NumberFormatException
     */
    public static int parseInt(char[] cArray) throws NumberFormatException {
        return parseInt(cArray, 10);
    }

    /**
     * Converts a byte array to an integer of base radix.
     * <br><br>
     * Array constraints are:
     * <li>Number must be less than 10 digits</li>
     * <li>Number must be positive</li>
     * @param bArray Byte Array representation of number
     * @param radix Number base to use
     * @return integer value of number
     * @throws NumberFormatException
     */
    public static int parseInt(byte[] bArray, int radix) throws NumberFormatException {
        int length = bArray.length;
        if (length > 9)
            throw new NumberFormatException("Number can have maximum 9 digits");
        int result = 0;
        int index = 0;
        int digit = Character.digit((char) bArray[index++], radix);
        if (digit == -1)
            throw new NumberFormatException("Byte array contains non-digit");
        result = digit;
        while (index < length) {
            result *= radix;
            digit = Character.digit((char) bArray[index++], radix);
            if (digit == -1)
                throw new NumberFormatException("Byte array contains non-digit");
            result += digit;
        }
        return result;
    }

    /**
     * Converts a byte array to an integer of radix 10.
     * <br><br>
     * Array constraints are:
     * <li>Number must be less than 10 digits</li>
     * <li>Number must be positive</li>
     * @param bArray Byte Array representation of number
     * @return integer value of number
     * @throws NumberFormatException
     */
    public static int parseInt(byte[] bArray) throws NumberFormatException {
        return parseInt(bArray, 10);
    }
}