How to use ical rdate in java to create meeting invite for multiple days using date

I want to create meeting invite for multiple days for different time slot on each day in java. however i don't want to use rrule because it doesn't support different time slot for each day.

I get some info about rdate to support multiple date with different time slot but didn't get full source code.I tried different combination but it doesn't work.

can anyone help me about this ?