Iterative Improvement

gistfile1.java

// Make all lines comments first
BufferedReader inputFile = new BufferedReader(new FileReader("input.txt"));
String line = null;
while((line=inputFile.readLine())!=null){
  System.out.println("comment found: " + line);
}

// Now find email addresses
BufferedReader inputFile = new BufferedReader(new FileReader("input.txt"));
String line = null;
String emailPattern = "([a-zA-Z_0-9\\.]+@email\\.com)?";
while((line=inputFile.readLine())!=null){
  if(Pattern.matches(emailPattern, line)) { System.out.println("email found: " + line); }
  else { System.out.println("comment found: " + line); }
}

// Now find regular addresses, notice I am just checking for the zip code...
BufferedReader inputFile = new BufferedReader(new FileReader("input.txt"));
String line = null;
String emailPattern = "([a-zA-Z_0-9\\.]+@email\\.com)?";
String addressPattern = "\\d\\d\\d\\d\\d$?";
while((line=inputFile.readLine())!=null){
 if(Pattern.matches(emailPattern, line)) { System.out.println("email found: " + line); }
 else if(Pattern.matches(addressPattern, line)) { 
   System.out.println("address found: " + line);
   outputFormattedAddress(line); 
 }
 else { System.out.println("comment found: " + line); }
}