Path: csiph.com!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail
From: Nigel Wade <nmw@local.domain>
Newsgroups: comp.lang.java.programmer
Subject: Re: How do I get the name and path of the running jar file?
Date: Mon, 12 Dec 2016 09:51:35 +0000
Lines: 36
Message-ID: <eb7a97F2n09U1@mid.individual.net>
References: <0564c643-106a-499a-833e-dffe34d1e915@googlegroups.com> <o27ri1$bbj$1@gioia.aioe.org> <eat50vFk6idU1@mid.individual.net> <o2ku8a$1gv3$1@gioia.aioe.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 8bit
X-Trace: individual.net UQAx4KVdlzlAXH1Gr3mWGA16pDZnnP28h3ifpnlT50Y4HSiDv+
Cancel-Lock: sha1:toPv2htIaLEblUNwAyDbl6h1tnI=
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0
In-Reply-To: <o2ku8a$1gv3$1@gioia.aioe.org>
Xref: csiph.com comp.lang.java.programmer:36086

On 12/12/16 01:24, Arne Vajhøj wrote:
> On 12/8/2016 8:20 AM, Nigel Wade wrote:
>> On 07/12/16 02:18, Arne Vajhøj wrote:
>>> You will get the full name including path of the jar with one of the
>>> following:
>>>
>>> String path =
>>> MyClass.class.getProtectionDomain().getCodeSource().getLocation().getPath();
>>>
>>>
>>> String path =
>>> MyClass.class.getClassLoader().getResource("mypackage/MyClass.class").getPath();
>>>
>>>
>>> The format is sligthly different. The first is probably more convenient
>>> as you would not need to truncate at the '!'.
>>
>> Both methods CodeSource.getLocation() and  ClassLoader.getResource()
>> return a URL, which will be URL encoded. So the path ought to be
>> URLdecode'd otherwise there may be problems with any characters in the
>> path which URL has encoded.
>>
>> Also, in the case of ClassLoader.getResource(), when executed from a jar
>> it will be of type "jar", and from class files it will be of type
>> "file". This will probably come into play when you run the code in an
>> IDE. NetBeans (I don't know about Eclipe) runs class files, not jars.
>> You will probably need to handle each case differently.
>
> Good points.
>
> But it should be possible to extract the information in the desired
> format.
>

It is definitely possible, but it's still good to be aware of the caveats before they cause you problems.