Java Utililty Methods Kill Process

int pid = getPid(port);
if (pid == 0) {
    return;
String[] command = { "taskkill", "/F", "/T", "/PID", Integer.toString(pid) };
if (System.getProperty("os.name").startsWith("Linux")) {
    String[] cmd = { "kill", "-9", Integer.toString(pid) };
    command = cmd;
...

try {
    ProcessBuilder processBuilder = new ProcessBuilder("taskkill ", "/IM", name);
    Process process = processBuilder.start();
    BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream()));
    String line = null;
    try {
        while ((line = br.readLine()) != null) {
    } catch (Exception e) {
        e.printStackTrace();
        if (br != null) {
            br.close();
} catch (Exception e) {

String command = ("killall " + processName);
try {
    Process p = Runtime.getRuntime().exec(command.split(" "));
    p.waitFor();
} catch (IOException e) {
    e.printStackTrace();
} catch (InterruptedException e) {
    e.printStackTrace();
...

if (isProcessRunning(processName)) {
    ProcessBuilder processBuilder = new ProcessBuilder();
    processBuilder.command("taskkill", "/F", "/IM", processName);
    Process process = processBuilder.start();
    process.waitFor();
    return !isProcessRunning(processName);
return false;
...

List<String> chrome;
try {
    chrome = getPIDsByNamePart(rootNamePart);
    for (String s : chrome) {
        int pid = Integer.parseInt(s);
        killChildProcesses(pid);
    killProcessesByNamePart(rootNamePart);
...

Runtime.getRuntime().exec("kill " + pid).waitFor();
return true;

List<String> list = new ArrayList<>();
list.add("/usr/bin/pkill");
list.addAll(args);
try {
    Process child = new ProcessBuilder(list.toArray(new String[list.size()])).start();
    child.waitFor();
} catch (InterruptedException | IOException e) {
    throw new RuntimeException("Can't kill process: " + e.getMessage());
...