Java - Capturar evento externo a programa.

private static boolean isProcessRunning(String processName) throws IOException, InterruptedException

{

        ProcessBuilder processBuilder = new ProcessBuilder("tasklist.exe");

        Process process = processBuilder.start();

        String tasksList = toString(process.getInputStream());

        return tasksList.contains(processName);

}

private  boolean isProcessRunning(String processName) throws IOException, InterruptedException

    {

        ProcessBuilder processBuilder = new ProcessBuilder("tasklist.exe");

        Process process = processBuilder.start();

        BufferedReader input = new BufferedReader(new InputStreamReader(process.getInputStream()));

        String task;

        while((task = input.readLine())!= null){

            if(task.contains(processName)) return(true);

        }return (false);

    }