String pattern = "^q[^u]\\d+\\.";
String input = "QA777. is the next flight. It is on time.";
Pattern reCaseInsens = Pattern.compile(pattern, Pattern.CASE_INSENSITIVE);
Pattern reCaseSens = Pattern.compile(pattern);
boolean found;
Matcher m;
m = reCaseInsens.matcher(input); // will match any case
found = m.lookingAt(); // will match any case
System.out.println("IGNORE_CASE match " + found);
m = reCaseSens.matcher(input); // Get matcher w/o case-insens flag
found = m.lookingAt(); // will match case-sensitively
System.out.println("MATCH_NORMAL match was " + found);
