How to add an environment variable in Java? [duplicate]

Answer 1

You can add the desired variables directly into ProcessBuilder.environment() map. The code below should work:

import java.util.Map;
import java.util.Set;

class helloworld  {
public static void main(String[] args) {

    ProcessBuilder pb = new ProcessBuilder("/bin/sh"); // or any other program you want to run

    Map envMap = pb.environment();

    envMap.put("MY_ENV_VAR", "1");
    Set keys = envMap.keySet();
    for(String key:keys){
        System.out.println(key+" ==> "+envMap.get(key));
    }

}

}