public   static  enum TypeRequest {
        CHECK("check"),
        PAYMENT("payment"),
        STATUS("status"),
        REVOKE("revoke");
         private   final  String typeRequest;
        TypeRequest(String typeRequest) {
             this .typeRequest = typeRequest;
        }
         public  String getTypeRequest() {
             return  typeRequest;
        }
    }

  String s = "check";
   switch  (unknow_construction(s)) {
   case  TypeRequest: {
       break ;
  }
....
  }

        String s = "CHECK";
        TypeRequest tr = TypeRequest.valueOf(s);
        
         switch  (tr) {
             case  CHECK: {
                System.out.println("CHECK");
                 break ;
            }
             case  PAYMENT: {
                System.out.println("PAYMENT");
                 break ;
            }
             case  REVOKE: {
                System.out.println("REVOKE");
                 break ;
            }
             case  STATUS: {
                System.out.println("STATUS");
                 break ;
            }
             default : {
                 break ;
            }
        }