Java Number Parse toNumber(final Object obj)

Description

to Number

License

Open Source License

Declaration

public static Number toNumber(final Object obj) 

Method Source Code

//package com.java2s;
/*/* w ww . j  av a  2s  .com*/
 * Swift Parallel Scripting Language (http://swift-lang.org)
 * Code from Java CoG Kit Project (see notice below) with modifications.
 *
 * Copyright 2005-2014 University of Chicago
 *
 * 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 {
    public static Number toNumber(final Object obj) {
        try {
            if (obj instanceof String) {
                return Double.valueOf((String) obj);
            } else if (obj instanceof Number) {
                return (Number) obj;
            } else {
                throw new IllegalArgumentException("Could not convert value to number: " + obj);
            }
        } catch (Exception e) {
            throw new IllegalArgumentException("Could not convert value to number: " + obj, e);
        }
    }
}

Related

1. isNumeric(String str)
2. isNumeric(String value, Locale locale)
3. isParsable(Object parser, String str)
4. toNumber(char letter)
5. toNumber(CharSequence jsonText)
6. toNumber(Object object, Number defaultValue)
7. toNumber(Object object, Number defaultValue)
8. toNumber(String hash)
9. toNumber(String num)