How Java program can run python program with virtual environment?

Question

I had several python programs and all of them had each virtual environment.

I want to run these python programs in Java program.

Now I run python program in Java like below:

Process process = Runtime.getRuntime().exec(command)

but I don't know how to run with virtual enviroment.
Can Java program run each Python program with each virtual environment?

Answer 1

In Runtime.exec(), ensure that the executable being executed is the python interpreter located inside the virtual environment.

For example, if your virtual environment is in /tmp/my-venv, use the following:

Process process = Runtime.getRuntime().exec("/tmp/my-venv/python hello.py");

Or:

Process process = Runtime.getRuntime().exec(new String[] {"/tmp/my-venv/python", "hello.py"});