JavaEnvironment.java

import java.lang.management.*;
import java.util.List;

public class JavaEnvironment {
  public static void main(String args[]) {
    System.out.println(
        "Number of available processors: " + Runtime.getRuntime().availableProcessors());
    
    System.out.println("GCs:");
    ManagementFactory
      .getGarbageCollectorMXBeans()
      .forEach(x -> System.out.println(x.getName()));
  }
}