Java Long Number From longFromObject(Object o)

Description

Converts an object to a long value.

License

Open Source License

Parameter

Parameter	Description
o	the object

Return

the long representation of the object

Declaration

public static long longFromObject(Object o) 

Method Source Code

//package com.java2s;
/*/*from w  ww . j a v  a 2s.c  o m*/
 * Copyright SparseWare Inc. All Rights Reserved.
 *
 * 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 {
    /**
     * Converts an object to a <code>long</code> value.
     *
     * @param o  the object
     *
     * @return   the <code>long</code> representation of the object
     */
    public static long longFromObject(Object o) {
        if (o != null) {
            if (o instanceof Integer) {
                return ((Integer) o).longValue();
            }

            if (o instanceof Long) {
                return ((Long) o).longValue();
            }

            if (o instanceof Double) {
                return ((Double) o).longValue();
            }

            if (o instanceof Float) {
                return ((Float) o).longValue();
            }

            if (o instanceof String) {
                return (Long.parseLong((String) o));
            }

            throw new NumberFormatException(
                    "Cannot convert the specified object to a long value");
        } else {
            return 0;
        }
    }
}

Related

1. longFromBytes(byte[] buffer, int offset)
2. longFromBytes(byte[] bytes, int index)
3. longFromBytes(byte[] bytes, int offset)
4. longFromDB(String dbLong)
5. longFromLex(byte[] bytes)
6. toLongAsObject(Object obj)
7. toLongBE(byte[] b, int i)
8. toLongBE(byte[] src, int offset)
9. toLongDate()