Compile a java file using docker with own path

Question

Hy. I'm trying to compile a .java file using docker. I read the files on docker's website, also I read these links:

docker's website

about volumes

and another question I had put up for gcc compiler

I understood the concept for the gcc compiler since it doesn't create any extra file for compiling. But the java one does. It creates a Main.class file on my /home directory if I use the following command and compile a file named Main.java

sudo docker run --rm -v "$PWD":/usr/src/myapp -w /usr/src/myapp java:7 javac Main.java

after learning from the above links I was able to successfully compile a java file with my own path using:

docker run --rm -v /mypathhere/mycode.java:/mycode.java: java:7 javac mycode.java"

if there is any error it shows an error but if there isn't it just compiles and gives me no output, and that's justified because it creates a Main.class file.

My problem is that I am unable to find that Main.class file. I don't know where docker is creating it and I have zero understanding for it. Please help me out.

Answer 1

The .class file will be inside the container, under the root directory.

The best plan is to mount the whole source directory and have javac put the result to the same directory e.g:

docker run --rm -v /mypathhere:/mycode java:7 sh -c "cd mycode; javac mycode.java"

That way, you should get the class file written to the mypathhere directory.

Apologies if that doesn't quite work - it's off the top of my head. Hopefully you get the idea though.