question: private String parseTypeString ( String typeString ) { StringBuilder result = new StringBuilder ( typeString ) ; for ( int i = 0 ; i < result . length ( ) ; i ++ ) { char c = result . charAt ( i ) ; if ( ! ( Character . isLetter ( c ) || Character . isDigit ( c ) || c == '.' ) ) { result . setCharAt ( i , '_' ) ; } } return result . toString ( ) ; }
target:  Performs any necessary string parsing on the input string such as converting non-alphanumeric character into underscore.