//This class provides static methods to return College Student
// year and class designations based on the Student's credits
//
public class CollegeYear
{
   //Return a student's year-code based on their credits
   // 0 .. 29 : 1    30 .. 59 : 2   60 .. 89 : 3   90+ : 4
   public static int code(int credits)
   {
      if ( credits < 0 )
         throw new RuntimeException("Invalid # Credits");
 
      int code;
      
      if ( credits < 30 )        //  0 .. 29
         code = 1;
      else
         code = 4;               

      return code;
   }

   //Return a student's year-name based on their credits
   //  0 .. 29: Freshman  30 .. 59: Sophomore   
   // 60 .. 89: Junior    90+     : Senior
   public static String name(int credits)
   {
      String name = "";
   
      switch ( code(credits) )
      {
         case 1 : name = "Freshman";
         case 2 : name = "Sophomore";
         case 3 : name = "Junior";
         case 4 : name = "Senior";  break;
         default: throw new RuntimeException("Invalid # Credits");
      }
    
      return name;
   }
   
   //Return a student's classification based on their credits
   //  0 .. 59: Underclassman    60+ : Upperclassman
   public static String classification(int credits)
   {
      switch ( code(credits) )
      {
         case 1 : return "Underclassman";  
         case 2 : return "Underclassman";
         case 3 : return "Upperclassman";
         case 4 : return "Upperclassman";
      }
      throw new RuntimeException("Invalid # Credits");
   }
  
}