Java Process exit Detection code.

ProcessWatch.java

/**
 * @author come25136
 */

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

class watch {
    static boolean pidwatch(int pid, int time) {
        final boolean[] timeout = {false};
        ArrayList<String> list = new ArrayList();

        new Thread(() -> {
            try {
                Thread.sleep(time);
                timeout[0] = false;
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }).start();

        try {
            while (!timeout[0]) {
                BufferedReader br = new BufferedReader(new InputStreamReader(new ProcessBuilder("tasklist").start().getInputStream()));
                for (String line = br.readLine(); line != null; line = br.readLine()) {
                    if (!line.isEmpty()) { list.add(line.replaceAll("\\s+", ",").split(",", -1)[1]); }
                }

                if (!list.contains(Integer.toString(pid))) {
                    return true;
                }

                list.clear();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return false;
    }
}