private JsonToken scanUnquotedString(final char firstChar) {
        StringBuilder sb = new StringBuilder();
        sb.append(firstChar);
        int c = buffer.read();
        while (c == '$' || c == '_' || Character.isLetterOrDigit(c)) {
            sb.append((char) c);
            c = buffer.read();
        }
        buffer.unread(c);
        String lexeme = sb.toString();
        return new JsonToken(JsonTokenType.UNQUOTED_STRING, lexeme);
    }
private JsonToken scanUnquotedString(final char firstChar) {
        StringBuilder sb = new StringBuilder();
        sb.append(firstChar);
        int c = buffer.read();
        while (c == '$' || c == '_' || Character.isLetterOrDigit(c)) {
            sb.append((char) c);
            c = buffer.read();
        }
        buffer.unread(c);
        String lexeme = sb.toString();
        return new JsonToken(JsonTokenType.UNQUOTED_STRING, lexeme);
    }
private JsonToken scanUnquotedString ( final char firstChar ) { StringBuilder sb = new StringBuilder ( ) ; sb . append ( firstChar ) ; int c = buffer . read ( ) ; while ( c == ' ' || c == ' ' || Character . isLetterOrDigit ( c ) ) { sb . append ( ( char ) c ) ; c = buffer . read ( ) ; } buffer . unread ( c ) ; String lexeme = sb . toString ( ) ; return new JsonToken ( JsonTokenType . UNQUOTED_STRING , lexeme ) ; }
Reads {@code StringToken} from source.

@return The string token.
Reads { @code StringToken } from source .