Android String to Double Convert getDoubleValue(String value)

Description

Get Double value

License

Apache License

Parameter

Parameter	Description
value	value

Return

double value

Declaration

public static Double getDoubleValue(String value) 

Method Source Code

//package com.java2s;
/*//from   w  w w .jav  a2  s . c  om
 * (C) Copyright Itude Mobile B.V., The Netherlands
 * 
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

public class Main {
    /**
     * Get {@link Double} value
     * @param value value
     * @return double value
     */
    public static Double getDoubleValue(String value) {
        if (isBlank(value)) {
            throw new NumberFormatException();
        }

        return Double.parseDouble(value.replaceAll(",", "."));
    }

    /**
     * <p>Checks if a String is whitespace, empty ("") or null.</p>
     *
     * <pre>
     * StringUtils.isBlank(null)      = true
     * StringUtils.isBlank("")        = true
     * StringUtils.isBlank(" ")       = true
     * StringUtils.isBlank("wiebe")     = false
     * StringUtils.isBlank("  wiebe  ") = false
     * </pre>
     *
     * @param str  the String to check, may be null
     * @return <code>true</code> if the String is null, empty or whitespace
     */
    public static boolean isBlank(String str) {
        int strLen;
        if (str == null || (strLen = str.length()) == 0) {
            return true;
        }
        for (int i = 0; i < strLen; i++) {
            if ((Character.isWhitespace(str.charAt(i)) == false)) {
                return false;
            }
        }
        return true;
    }
}

Related

1. transformToDigit(String numString)
2. getDouble(String str, double defaultValue)
3. getDoubleFromStr(String str)
4. parseDistance(double distance)
5. parseDouble(String string, double defValue)
6. toDouble(String s)