Java Runtime get number of processors available to JVM

public class Main {
  public static void main(String[] args) {
    // Get the Runtime instance
    Runtime rt = Runtime.getRuntime();

    // Print the number of processors available to the JVM
    int processors = rt.availableProcessors();
    System.out.format("Number of processors = %d%n", processors);

  }//from w ww .  ja va 2  s. c om
}