question: public static boolean caseIgnoreMatch ( String s1 , String s2 ) { if ( s1 == s2 ) { return true ; } int len = s1 . length ( ) ; if ( len != s2 . length ( ) ) { return false ; } for ( int i = 0 ; i < len ; i ++ ) { char c1 = s1 . charAt ( i ) ; char c2 = s2 . charAt ( i ) ; if ( c1 != c2 && toLower ( c1 ) != toLower ( c2 ) ) { return false ; } } return true ; }
target:  Compares two ASCII Strings s1 and s2, ignoring case.