/** * Gets the number of cores available in this device, across all processors. * Requires: Ability to peruse the filesystem at "/sys/devices/system/cpu" * @return The number of cores, or 1 if failed to get result */ private int getNumCores() { //Private Class to display only CPU devices in the directory listing class CpuFilter implements FileFilter { @Override public boolean accept(File pathname) { //Check if filename is "cpu", followed by a single digit number if(Pattern.matches("cpu[0-9]", pathname.getName())) { return true; } return false; } } try { //Get directory containing CPU info File dir = new File("/sys/devices/system/cpu/"); //Filter to only list the devices we care about File[] files = dir.listFiles(new CpuFilter()); //Return the number of cores (virtual CPU devices) return files.length; } catch(Exception e) { //Default to return 1 core return 1; } }