复制代码 代码如下:

/**

* 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;

}

}