question: public char nextcharClass ( char c , boolean advance ) { int distance = 0 ; if ( c == '\\' && text . charAt ( textPos ) == 'u' ) { int y , digit , thisChar = 0 ; for ( y = textPos + 1 ; y < textPos + 5 && y < text . length ( ) ; y ++ ) { digit = Character . digit ( text . charAt ( y ) , 16 ) ; if ( digit == - 1 ) break ; thisChar = ( thisChar << 4 ) + digit ; } if ( y == textPos + 5 && Character . isDefined ( ( char ) thisChar ) ) { c = ( char ) thisChar ; distance = 5 ; } else { distance = 1 ; } } if ( advance ) textPos += distance ; return javaTypeOfToCharacterClass ( Character . getType ( c ) ) ; }
target:  Advance the input cursor if advance is true.