How can Java program on windows machine get a PID of a given process without using JNA

Question

I want to kill the particular Java process in Window with the following command line:

taskkill /f /pid <my_pid>

I didn't find a way to get the pid of my process on windows without using JNA api. I found several answers that use JNA but I'm looking for a simpler solution.

Following is the Java code that I used (which does not work):

   Field f = p.getClass().getDeclaredField("handle");
   f.setAccessible(true);
   long handle = f.getLong(p);
   System.out.println("Kill pid " + handle);

Answer 1

Finally I found a solution. I have used wmic process get commandline, processid windows command to get the PID.

Following is my Killer.java :

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;

public class Killer {


public static void main(String[] args) throws Exception {



    ArrayList<String> cmds = new ArrayList<String>();

    cmds.add("wmic");
    cmds.add("process");
    cmds.add("get");
    cmds.add("commandline,processid");

    ProcessBuilder pb = new ProcessBuilder(cmds);

    Process p = pb.start();

    //p.waitFor();


    BufferedReader rd = new BufferedReader(new InputStreamReader(p.getInputStream()));

    String line;
    int pid=0;

    while((line = rd.readLine()) != null)
    {
        if(line.contains(args[0]) && !line.contains("Killer"))
        {

            System.out.println("OK" + line);
            String[] split = line.split(" ");
            pid=Integer.parseInt(split[split.length - 1]);

        }
        else
        {
            //System.out.println("  " + line);
        }
    }

    cmds = new ArrayList<String>();

    System.out.println("Kill pid " + pid);
    cmds.add("taskkill");
    cmds.add("/T");
    cmds.add("/F");
    cmds.add("/PID");
    cmds.add("" + pid);
    pb = new ProcessBuilder(cmds);
    pb.start();
 }               
}

Hope it will help you.