Java Long Number Create toLongObject(Object o)

Description

to Long Object

License

MIT License

Declaration

public static Long toLongObject(Object o) 

Method Source Code

//package com.java2s;
/*!/*  ww w .j a  v  a2  s. c o m*/
  * mifmi-commons4j
  * https://github.com/mifmi/mifmi-commons4j
  *
  * Copyright (c) 2015 mifmi.org and other contributors
  * Released under the MIT license
  * https://opensource.org/licenses/MIT
  */

import java.text.DecimalFormat;

public class Main {
    public static Long toLongObject(Object o) {
        if (o == null) {
            return null;
        }

        Long num;
        if (o instanceof Long) {
            num = (Long) o;
        } else if (o instanceof Number) {
            num = Long.valueOf(((Number) o).longValue());
        } else if (o instanceof Character) {
            num = Long.valueOf((long) ((Character) o).charValue());
        } else if (o instanceof String) {
            String s = (String) o;
            if (s.isEmpty()) {
                num = null;
            } else {
                num = Long.valueOf(s);
            }
        } else if (o instanceof Boolean) {
            num = ((Boolean) o).booleanValue() ? Long.valueOf(1L) : Long.valueOf(0L);
        } else if (o instanceof Enum) {
            num = Long.valueOf((long) ((Enum<?>) o).ordinal());
        } else {
            num = Long.valueOf(o.toString());
        }

        return num;
    }

    public static String toString(Number value, String pattern) {
        if (value == null) {
            return null;
        }

        DecimalFormat df = new DecimalFormat(pattern);

        return df.format(value);
    }
}

Related

1. toLong(String value, long def)
2. toLong(String value, Long defaultValue)
3. toLong(String value, long defaultValue)
4. toLong(String value, Long defaultValue)
5. toLong(T value)