Java String to Long atol(String str)

Description

Convert a string to integer.

License

Open Source License

Parameter

Parameter	Description
str	a decimal string.

Return

the result integer.

Declaration

public static long atol(String str) 

Method Source Code

//package com.java2s;
/*************************************************************************************************
 * Java binding of Tokyo Cabinet/*from  w  w  w .  j a v  a 2  s.  c o  m*/
 *                                                               Copyright (C) 2006-2010 FAL Labs
 * This file is part of Tokyo Cabinet.
 * Tokyo Cabinet is free software; you can redistribute it and/or modify it under the terms of
 * the GNU Lesser General Public License as published by the Free Software Foundation; either
 * version 2.1 of the License or any later version.  Tokyo Cabinet 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 Lesser General Public
 * License for more details.
 * You should have received a copy of the GNU Lesser General Public License along with Tokyo
 * Cabinet; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307 USA.
 *************************************************************************************************/

public class Main {
    /**
     * Convert a string to integer.
     * @param str a decimal string.
     * @return the result integer.
     */
    public static long atol(String str) {
        int len = str.length();
        long num = 0;
        int sign = 1;
        for (int i = 0; i < len; i++) {
            char c = str.charAt(i);
            if (c <= ' ')
                continue;
            if (c == '-') {
                sign = -1;
            } else if (c >= '0' && c <= '9') {
                num = num * 10 + c - '0';
            } else {
                break;
            }
        }
        return num * sign;
    }
}

Related

1. asLong(String value)
2. asLong(String value)
3. atol(final String str, final long def)
4. atol(String pString_)
5. atol(String s)
6. convertStringToLong(String string)