Java Integer Create toInteger(String ascii)

Description

A helper method to convert a 4 character ASCII String into an integer.

License

Open Source License

Declaration

public static int toInteger(String ascii) 

Method Source Code

//package com.java2s;
/*//from w w w .  j a va 2 s . co  m
 * Mojito Distributed Hash Table (Mojito DHT)
 * Copyright (C) 2006-2007 LimeWire LLC
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

public class Main {
    /**
     * A helper method to convert a 4 character ASCII String
     * into an integer.
     */
    public static int toInteger(String ascii) {
        if (ascii == null) {
            throw new NullPointerException("String is null");
        }

        char[] chars = ascii.toCharArray();
        if (chars.length != 4) {
            throw new IllegalArgumentException("String must be 4 characters long");
        }

        int id = 0;
        for (char c : chars) {
            id = (id << 8) | (c & 0xFF);
        }
        return id;
    }
}

Related

1. toInteger(Object value)
2. toInteger(Object value)
3. toInteger(Object value)
4. toInteger(Object value, int defaultValue)
5. toInteger(Object x)
6. toInteger(String integer)
7. toInteger(String numeric)
8. toInteger(String numericString)
9. toInteger(String pString)