Java Enumeration Type with validator

import java.util.HashMap;
import java.util.Map;
import java.util.regex.Pattern;

enum FieldType {/*from   w w w.j a v a2 s  .  c o  m*/

    PASSWORD("password") {

        @Override
        public boolean validate(String fieldValue) {
            return Pattern.matches("((?=.*\\d)(?=.*[a-z])(?=.*[A-Z]).{6,})", 
                                   fieldValue);
        }
    },

    EMAIL_ADDRESS("email") {

        @Override
        public boolean validate(String fieldValue) {
            return Pattern.matches("^[\\w\\.-]+@([\\w\\-]+\\.)+[A-Z|a-z]{2,4}$",
                                   fieldValue);    
        }
    },

    PHONE_NUMBER("phone") {

        @Override
        public boolean validate(String fieldValue) {
            return Pattern.matches("^1?[- ]?\\(?(\\d{3})\\)?[- ]?(\\d{3})[- ]?(\\d{4})$",
                                   fieldValue);
        }
    },

    SOCIAL_SECURITY_NUMBER("ssn") {

        @Override
        public boolean validate(String fieldValue) {
            return Pattern.matches("^\\d{3}[- ]?\\d{2}[- ]?\\d{4}$", 
                                   fieldValue);
        }

    };  // End of enum constants definition

    // Instance members
    //
    private String fieldName;

    private FieldType(String fieldName) {
        this.fieldName = fieldName;
    }

    public String getFieldName() {
        return this.fieldName;
    }

    abstract boolean validate(String fieldValue);
    



}

public class Main{   
   // Static class members
   //
   private static final Map<String, FieldType> nameToFieldTypeMap = new HashMap<>();

   static {
      for (FieldType field : FieldType.values()) {
          nameToFieldTypeMap.put(field.getFieldName(), field);
      }
  }

  public static FieldType lookup(String fieldName) {
      return nameToFieldTypeMap.get(fieldName.toLowerCase());
  }

  private static void printValid(FieldType field, String fieldValue, boolean valid) {
      System.out.println(field.getFieldName() + 
                         "(\"" + fieldValue + "\") valid: " + valid);
  }

   public static void main(String... args) {
      
      String fieldName = "password";
      String fieldValue = "123";  // invalid - must be at least 6 characters
      FieldType field = lookup(fieldName);
      printValid(field, fieldValue, field.validate(fieldValue));

      fieldName = "phone";
      fieldValue = "1-800-555-1234";  // valid
      field = lookup(fieldName);
      printValid(field, fieldValue, field.validate(fieldValue));

      fieldName = "email";
      fieldValue = "css@demo2s";  // invalid - missing .<tld>
      field = lookup(fieldName);
      printValid(field, fieldValue, field.validate(fieldValue));

      fieldName = "ssn";
      fieldValue = "111-11-1111";  // valid
      field = lookup(fieldName);
      printValid(field, fieldValue, field.validate(fieldValue));
  }
}