How can I get the path of the compiled jar file via code?

Question

I want to use image files for my java program, and for that I need File objects. But I have the problem that when I build my project, the project name has a .jar at the end of the name, making a File object like new File("..\\Project\\src\\ImageDirectory\\Image.png") useless, since the directory doesn't exist.

I've found out I could tecnically iterate through all the directorys on the computer but I don't want to do that because that could take some time with high amounts of directories and harddrives.

So, is there a reliable and easy way to get the directory the jar file is currently in?

My IDE is InellijIDEA

thy this one System.getProperty("user.dir")

Mr. Skip
– Mr. Skip

2018-11-29 19:34:45 +00:00
Commented Nov 29, 2018 at 19:34 — Mr. Skip
– Mr. Skip, Commented Nov 29, 2018 at 19:34

gonzaloan · Accepted Answer · 2018-11-29 19:53:03Z

You can use Path to do this:

Path path = Paths.get(YourMainClass.class.getProtectionDomain().getCodeSource().getLocation().toURI());

Path have several methods to get more information.

For example, i have this JAR in Desktop and i am printing this:

System.out.println(path); System.out.println(path.getRoot()); System.out.println(path.getParent());

The results are:

java -jar C:\Users\gmunozme\Desktop\Test.jar C:\Users\gmunozme\Desktop\Test.jar C:\ C:\Users\gmunozme\Desktop

Check that out, Hope you can use it.

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