Java Double Number From toDoubleValue(Object number)

Description

Returns the number object as a double

License

Open Source License

Parameter

Parameter	Description
number	this can be a String or any number type

Return

a double value or an exception

Declaration

public static double toDoubleValue(Object number) 

Method Source Code

//package com.java2s;
/*/*ww w  .  jav  a  2  s .com*/
 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores
 * CA 94065 USA or visit www.oracle.com if you need additional information or
 * have any questions.
 */

public class Main {
    /**
     * Returns the number object as a double
     * @param number this can be a String or any number type
     * @return a double value or an exception
     */
    public static double toDoubleValue(Object number) {
        // we should convert this to use Number
        if (number instanceof Double) {
            return ((Double) number).doubleValue();
        }
        if (number instanceof Float) {
            return ((Float) number).doubleValue();
        }
        if (number instanceof Long) {
            return ((Long) number).doubleValue();
        }
        if (number instanceof Integer) {
            return ((Integer) number).doubleValue();
        }
        if (number instanceof String) {
            return Double.parseDouble((String) number);
        }
        /*if(number instanceof Short) {
        return ((Short)number).doubleValue();
        }
        if(number instanceof Byte) {
        return ((Byte)number).doubleValue();
        }*/
        if (number instanceof Boolean) {
            Boolean b = (Boolean) number;
            if (b.booleanValue()) {
                return 1;
            }
            return 0;
        }
        throw new IllegalArgumentException("Not a number: " + number);
    }
}

Related

1. toDoubles(Double[] values)
2. toDoubles(int[][] intPts)
3. toDoubles(Object[] extraArgs)
4. toDoubleScore(Float score)
5. toDoubleString(Double d)
6. toDoubleValue(Object value)