how to compare two dates in stream filter in java 8?

Question

I get two dates from a request object using stream filter. There I have to compare those objects then collect them store in list. But now i get this error. Please help me with it.

Error:

Type mismatch: cannot convert from int to boolean

Code:

Date checkIn = req.getCheckIn();
Date checkOut = req.getCheckOut();

List<PlaceBook> filtered = checkInVal.stream().filter(string -> 
            string.getCheckInDt().compareTo(checkIn)).collect(Collectors.toList());

Solution

You dont declare what your filter condition actually is:

List<PlaceBook> filtered = checkInVal.stream().filter(string -> 
        string.getCheckInDt().compareTo(checkIn) == 0 /* == 0, for example is missing*/).collect(Collectors.toList());

compareTo by itself returns an int value, that cannot be cast to boolean, which is required by filter.

BTW 'string' is not a good name in the filter.

Comments

[misko321]

Maybe you wanted to use equals instead of compareTo?