How to execute command with parameters?

Question

How am I to execute a command in Java with parameters?

I've tried

Process p = Runtime.getRuntime().exec(new String[]{"php","/var/www/script.php -m 2"});

which doesn't work.

String[] options = new String[]{"option1", "option2"};
Runtime.getRuntime().exec("command", options);

This doesn't work as well, because the m parameter is not specified.

Answer 1

See if this works (sorry can't test it right now)

Runtime.getRuntime().exec(new String[]{"php","/var/www/script.php", "-m", "2"});

• AxelH: This should mention that this is important to set one String per command; parameter or value. So "-m 2" might not work. This need to be "-m", "2"

Answer 2

Use ProcessBuilder instead of Runtime#exec().

ProcessBuilder pb = new ProcessBuilder("php", "/var/www/script.php", "-m 2");
Process p = pb.start();

• Matt Ball: If that doesn't work: new ProcessBuilder("php", "/var/www/script.php", "-m", "2");

Answer 3

The following should work fine.

Process p = Runtime.getRuntime().exec("php /var/www/script.php -m 2");

Answer 4

Below is java code for executing python script with java.

ProcessBuilder:

• First argument is path to virtual environment
• Second argument is path to python file
• Third argument is any argumrnt you want to pass to python script

public class JavaCode {
 public static void main(String[] args) throws IOException {
 String lines = null;
 ProcessBuilder builder = new ProcessBuilder("/home/env-scrapping/bin/python",
 "/home/Scrapping/script.py", "arg1");
 Process process = builder.start();
 BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
 while ((lines = reader.readLine())!=null) {
 System.out.println("Line: " + lines);
 }
 }
}

First is virtual environment path

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