Java Long Number Create toLong(Object obj)

Description

Converts an Object to a long.

License

Open Source License

Parameter

Parameter	Description
obj	Object to convert

Return

long value

Declaration

public static long toLong(Object obj) 

Method Source Code

//package com.java2s;
/*/*from   w  w  w .  ja  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>long</code>. Returns
     * zero if conversion is not possible.
     * @param obj Object to convert
     * @return long value
     */
    public static long toLong(Object obj) {
        Long result = toLongObject(obj);
        return result == null ? 0 : result.longValue();
    }

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

Related

1. toLong(Object obj)
2. toLong(Object obj)
3. toLong(Object obj)
4. toLong(Object obj)
5. toLong(Object obj)
6. toLong(Object obj)
7. toLong(Object obj)
8. toLong(Object obj, String pattern)
9. toLong(Object object)