Java Double Number Create toDouble(Object obj)

Description

Converts an Object to a double.

License

Open Source License

Parameter

Parameter	Description
obj	Object to convert

Return

double value

Declaration

public static double toDouble(Object obj) 

Method Source Code

//package com.java2s;
/*/*w w  w  .j a v  a2  s  .c  o  m*/
 * Copyright (C) 2003-2011 eXo Platform SAS.
 *
 * 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 an <code>Object</code> to a <code>double</code>. Returns
     * zero if conversion is not possible.
     * @param obj Object to convert
     * @return double value
     */
    public static double toDouble(Object obj) {
        Double result = toDoubleObject(obj);
        return result == null ? 0.0 : result.doubleValue();
    }

    /** Converts an <code>Object</code> to a <code>Double</code>. Returns
     * <code>null</code> if conversion is not possible.
     * @param obj Object to convert
     * @return Double
     */
    public static Double toDoubleObject(Object obj) {
        if (obj == null) {
            return null;
        }
        if (obj instanceof Double) {
            return (Double) obj;
        }
        if (obj instanceof Number) {
            return new Double(((Number) obj).doubleValue());
        }
        Double result = null;
        try {
            result = Double.parseDouble(obj.toString());
        } catch (Exception e) {
        }
        return result;
    }
}

Related

1. toDouble(Object obj)
2. toDouble(Object obj)
3. toDouble(Object obj)
4. toDouble(Object obj)
5. toDouble(Object obj)
6. toDouble(Object object)
7. toDouble(Object object, double defaultValue)
8. toDouble(Object object, Double defaultValue)
9. toDouble(Object objValue)