// Fig. 30.23: RegexSubstitution.java
// Using methods replaceFirst, replaceAll and split.

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";
         
      System.out.printf( "Original String 1: %s\n", firstString );

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

      System.out.printf( "^ substituted for *: %s\n", firstString );

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

      System.out.printf(
         "\"carets\" substituted for \"stars\": %s\n", firstString );

      // replace words with 'word'
      System.out.printf( "Every word replaced by \"word\": %s\n\n",
         firstString.replaceAll( "\\w+", "word" ) );

      System.out.printf( "Original String 2: %s\n", secondString );

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

      System.out.printf( 
         "First 3 digits replaced by \"digit\" : %s\n", secondString );
      String output = "String split at commas: [";

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

      for ( String string : results )
         output += "\"" + string + "\", "; // output results

      // remove the extra comma and add a bracket
      output = output.substring( 0, output.length() - 2 ) + "]";
      System.out.println( output );
   } // end main
} // end class RegexSubstitution

/*
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 * (C) Copyright 1992-2007 by Deitel & Associates, Inc. and               *
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