Pattern. CASE_INSENSITIVE Enables case-insensitive matching . By default, case-insensitive matching assumes that only characters in the US-ASCII charset are being matched. Unicode-aware case-insensitive matching can be enabled by specifying the UNICODE_CASE flag in conjunction with this flag.
Read moreHow do you lowercase a letter in java?
Java String toLowerCase() Method The toLowerCase() method converts a string to lower case letters . Note: The toUpperCase() method converts a string to upper case letters.
Read more