我如何通过Java中的终端执行python脚本

Question

Im trying to run python script via terminal but it always throws an exception: No such file or directory

StringBuffer output = new StringBuffer();

String command = "python3 Users/lounah/Documents/programming/ApplicationName/scriptName.py " + params.toString();

ProcessBuilder processBuilder = new ProcessBuilder(command);
Process process = processBuilder.start();

BufferedReader reader =
        new BufferedReader(new InputStreamReader(process.getInputStream()));

String line;
while ((line = reader.readLine())!= null) {
    output.append(line + "\n");
}

Answer 1

When you pass a string in ProcessBuilder it tries to run a program located in that path.
Instaed you should use a String[] with the path of your executable ( '/python3/python.exe' or 'python' or 'py' ) followed by the path of your script, followed by the arguments.

String[] command = {
    "python3",
    "Users/lounah/Documents/programming/ApplicationName/scriptName.py", 
    params.toString()
};
ProcessBuilder processBuilder = new ProcessBuilder(command);