// Fig. 11.23: RegexSubstitution.java
// Using methods replaceFirst, replaceAll and split.
import javax.swing.*;

public class RegexSubstitution
{
   public static void main( String args[] )
   {
      String firstString = "This sentence ends in 5 stars *****";
      String secondString = "1, 2, 3, 4, 5, 6, 7, 8";
         
      String output = "Original String 1: " + firstString;

      // replace '*' with '^'
      firstString = firstString.replaceAll( "\\*", "^" );

      output += "\n^ substituted for *: " + firstString;

      // replace 'stars' with 'carets'
      firstString = firstString.replaceAll( "stars", "carets" );

      output += "\n\"carets\" substituted for \"stars\": " + firstString;

      // replace words with 'word'
      output += "\nEvery word replaced by \"word\": " + 
         firstString.replaceAll( "\\w+", "word" );

      output += "\n\nOriginal String 2: " + secondString;

      // replace first three digits with 'digit'     
      for ( int i = 0; i < 3; i++ )
         secondString = secondString.replaceFirst( "\\d", "digit" );

      output += "\nFirst 3 digits replaced by \"digit\" : " + 
         secondString;
      output += "\nString split at commas: [";

      String[] results = secondString.split( ",\\s*" ); // split on commas

      for ( int i = 0; i < results.length; i++ )
         output += "\"" + results[ i ] + "\", "; // output results

      // remove the extra comma and add a bracket
      output = output.substring( 0, output.length() - 2 ) + "]";

      JOptionPane.showMessageDialog( null, output ); 
      System.exit( 0 );

   } // end method main

} // end class RegexSubstitution

/*
 **************************************************************************
 * (C) Copyright 1992-2003 by Deitel & Associates, Inc. and               *
 * Prentice Hall. 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        *
 * to determine their effectiveness. The authors and publisher make       *
 * no warranty of any kind, expressed or implied, with regard to these    *
 * programs or to the documentation contained in these books. The authors *
 * and publisher shall not be liable in any event for incidental or       *
 * consequential damages in connection with, or arising out of, the       *
 * furnishing, performance, or use of these programs.                     *
 **************************************************************************
*/