public boolean isCurrentBetween(char left, char right) {
	if (!isValidIndex()) return false;
	return lcText[pos] >= left && lcText[pos] <= right;
    }
public boolean isCurrentBetween ( char left , char right ) { if ( ! isValidIndex ( ) ) return false ; return lcText [ pos ] >= left && lcText [ pos ] <= right ; }
is the character at the current position (internal pointer) in the range of the given input
characters?

@param left lower value.
@param right upper value.