Java String to Double atof(String pString_)

Description

String to float converter.

License

LGPL

Declaration

public static float atof(String pString_) 

Method Source Code

//package com.java2s;
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1/*from   w ww  .  j  ava  2 s  . c om*/
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the reusable ccl java library
 * (http://www.kclee.com/clemens/java/ccl/).
 *
 * The Initial Developer of the Original Code is
 * Chr. Clemens Lee.
 * Portions created by Chr. Clemens Lee are Copyright (C) 2002
 * Chr. Clemens Lee. All Rights Reserved.
 *
 * Contributor(s): Chr. Clemens Lee <clemens@kclee.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

import java.util.*;

public class Main {
    /**
     * String to float converter. An empty string gets
     * converted to 0.0, while a string that is not 
     * adequately formatted results in NaN (not a number).
     */
    public static float atof(String pString_) {
        float fRetVal = 0.0f;

        if (isEmpty(pString_)) {
            return fRetVal;
        }

        try {
            fRetVal = Float.valueOf(pString_).floatValue();
        } catch (NumberFormatException pNumberFormatException) {
            fRetVal = Float.NaN;
        }

        return fRetVal;
    }

    /**
     * Tests, if a given String equals null or "".
     */
    public static boolean isEmpty(String sTest_) {
        if (sTest_ == null || sTest_.equals("")) {
            return true;
        }

        return false;
    }

    /**
     * Tests, if a given Vector is null or has size 0.
     */
    public static boolean isEmpty(Vector vTest_) {
        if (vTest_ == null || vTest_.size() == 0) {
            return true;
        }

        return false;
    }

    /**
     * Do the elements of two vectors at the same position
     * equal each other?
     */
    public static boolean equals(Vector vFirst_, Vector vSecond_) {
        if (vFirst_ == vSecond_) {
            return true;
        }
        if (vFirst_ == null || vSecond_ == null) {
            return false;
        }
        if (vFirst_.size() != vSecond_.size()) {
            return false;
        }
        for (int index = 0; index < vFirst_.size(); index++) {
            Object oFirst = vFirst_.elementAt(index);
            Object oSecond = vSecond_.elementAt(index);
            if (oFirst == null && oSecond == null) {
                continue;
            }
            if (oFirst == null || oSecond == null) {
                return false;
            }
            if (!oFirst.equals(oSecond)) {
                return false;
            }
        }

        return true;
    }
}

Related

1. asDouble(final String str, final double def)
2. asDouble(String str)
3. asDouble(String string)
4. asDouble(String value)
5. atof(String s)
6. atof(String s)
7. atof(String s)
8. convertStringToDouble(String num)