public static final  void main(String[] args) 
{
        
    int token;
    PatternMatcherInput input;
    PatternMatcher matcher;
    PatternCompiler compiler;
    Pattern[] patterns;
    Pattern tokenSeparator = null;
    MatchResult result;
    if(args.length <  1) {
      System.err.println("Usage: prefixExample < sample input >");
      System.exit(1);
    }
    input    = new PatternMatcherInput(args[0]);
    compiler = new AwkCompiler();
    patterns = new Pattern[tokens.length];
    try {
      tokenSeparator = compiler.compile(whitespace);
      for(token=0; token <  tokens.length; token++)
	patterns[token] = compiler.compile(tokens[token]);
    } catch(MalformedPatternException e) {
      System.err.println("Bad pattern.");
      e.printStackTrace();
      System.exit(1);
    }
    matcher  = new AwkMatcher();
  _whileLoop:
    while(!input.endOfInput()) {
      for(token = 0; token <  tokens.length; token++)
	if(matcher.matchesPrefix(input, patterns[token])) {
	  int offset;
	  result = matcher.getMatch();
	  offset = input.getCurrentOffset();
	  input.setCurrentOffset(result.endOffset(0));
	  if(matcher.matchesPrefix(input, tokenSeparator)) {
	    input.setCurrentOffset(matcher.getMatch().endOffset(0));
	    System.out.println(types[token] + ": " + result);
	    continue _whileLoop;
	  } else if(input.endOfInput()) {
	    System.out.println(types[token] + ": " + result);
	    break _whileLoop;
	  }
	  input.setCurrentOffset(offset);
	}
      if(matcher.matchesPrefix(input, tokenSeparator))
	input.setCurrentOffset(matcher.getMatch().endOffset(0));
      else {
	System.err.println("Unrecognized token starting at offset: " +
			   input.getCurrentOffset());
	break;
      }
    }
}