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Thread: Get location of main class file on disk

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    Question Get location of main class file on disk

    I am rewriting one of my old AutoIt programs in Java

    AutoIt had a neat feature "At Symbol"ScriptDir (Google it to find the help file, I've already lost this post once to link restrictions). "At Symbol"ScriptDir functioned as a string containing the directory that the script was located at in the filesystem.

    I can't find the right search terms to google a similar feature for Java in google. I would greatly appreciate any help.

    Thank you.

    Note: the "At Symbol"s should be actual at symbols, but they trigger the link restrictions.

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    Default Re: Get location of main class file on disk

    For the java program to execute a class file, the file needs to be on the path referenced by the package/classpath.
    If the java program uses a custom classloader then I imagine the class file could be anywhere.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Get location of main class file on disk

    I'm sorry I didn't say why I wanted to do this. I need it to be able to find, read, and write to a text file in the same directory.

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    Default Re: Get location of main class file on disk

    What I meant to describe was how code in a class file would find the directory the class file is located in. I assumed that is what you were asking.
    A combination of the path to the directory where the java command was executed and the classpath/package would point to the location of the class file.

    There are a lot of new classes and methods in the later releases. Perhaps one of them will give the value you want.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Get location of main class file on disk

    Thanks, that was what I meant, I just misunderstood the first time, I'll try that.

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    Default Re: Get location of main class file on disk

    Use following Code:
    package schachfiguren;
    import java.net.*;
    public class Locator 
    {
    	public URL getURL(String pfad)
    	{
    		URL url = this.getClass().getResource(pfad);
    		return url;
    	}
    }
    Where pfad could be 'Main.class' and Locator.class must be in the same Directory as Main.class.
    Last edited by MyOggRadio; September 20th, 2019 at 12:18 AM.

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    Default Re: Get location of main class file on disk

    The call to getResource could be done from the class that wants to know its location. It wouldn't need to be in a separate class.
    If the class files are in a jarfile then there could be a problem.
    If you don't understand my answer, don't ignore it, ask a question.

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