// Fig. 29.20: ValidateInput.java
// Validate user information using regular expressions.

public class ValidateInput  
{
   // validate first name
   public static boolean validateFirstName( String firstName )
   {
      return firstName.matches( "[A-Z][a-zA-Z]*" );
   } // end method validateFirstName

   // validate last name
   public static boolean validateLastName( String lastName )
   {
      return lastName.matches( "[a-zA-z]+([ '-][a-zA-Z]+)*" );
   } // end method validateLastName

   // validate address
   public static boolean validateAddress( String address )
   {
      return address.matches( 
         "\\d+\\s+([a-zA-Z]+|[a-zA-Z]+\\s[a-zA-Z]+)" );
   } // end method validateAddress

   // validate city
   public static boolean validateCity( String city )
   {
      return city.matches( "([a-zA-Z]+|[a-zA-Z]+\\s[a-zA-Z]+)" );
   } // end method validateCity

   // validate state
   public static boolean validateState( String state )
   {
      return state.matches( "([a-zA-Z]+|[a-zA-Z]+\\s[a-zA-Z]+)" ) ;
   } // end method validateState

   // validate zip
   public static boolean validateZip( String zip )
   {
      return zip.matches( "\\d{5}" );
   } // end method validateZip

   // validate phone
   public static boolean validatePhone( String phone )
   {
      return phone.matches( "[1-9]\\d{2}-[1-9]\\d{2}-\\d{4}" );
   } // end method validatePhone
} // end class ValidateInput

/*
 **************************************************************************
 * (C) Copyright 1992-2005 by Deitel & Associates, Inc. and               *
 * Pearson Education, Inc. All Rights Reserved.                           *
 *                                                                        *
 * DISCLAIMER: The authors and publisher of this book have used their     *
 * best efforts in preparing the book. These efforts include the          *
 * development, research, and testing of the theories and programs        *
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