public class Richter
{  public static void main(String[] args)
   {  ConsoleReader console = new ConsoleReader(System.in);

      System.out.println
         ("Enter a magnitude on the Richter scale:");
      double magnitude = console.readDouble();

      Earthquake quake = new Earthquake(magnitude);
      System.out.println(quake.getDescription());
   }
}

class Earthquake
{  public Earthquake(double magnitude)
   {  richter = magnitude;
   }
   
   public String getDescription()
   {  String r;
      if (richter >= 8.0)
         r = "Most structures fall";
      else if (richter >= 7.0)
         r = "Many buildings destroyed";
      else if (richter >= 6.0)
         r = "Many buildings considerably damaged, some collapse";
      else if (richter >= 4.5)
         r = "Damage to poorly constructed buildings";
      else if (richter >= 3.5)
         r = "Felt by many people, no destruction";
      else if (richter >= 0)
         r = "Generally not felt by people";
      else
         r = "Negative numbers are not valid";
      return r;
   }
   
   private double richter;
}