Java / Java8 streams
Explain the Collectors framework in Java8.
Java 8 Collectors main components are,
- Stream.collect() method,
- Collector interface,
- and Collectors class.
collect() method, a terminal operation in Stream interface, is a special case of reduction operation called mutable reduction operation because it returns mutable result container such as List, Set or Map according to supplied Collector.
java.util.stream.Collector interface contains functions that work together to accumulate input elements into a mutable result container.
java.util.stream.Collectors class contains static factory methods that perform some common reduction operations such as accumulating elements into Collection, finding min, max, average, the sum of elements, etc. All the methods of Collectors class return Collector type which will be supplied to collect() method as an argument.
List<String> empNameList = employeeList.stream().map(emp-> emp.getName()).collect(Collectors.toList());
Dogecoin
! Earn free bitcoins up to $250 now by signing up.
Earn bitcoins upto $250 (free), invest in other Cryptocurrencies when you signup with blockfi.
Use the referral link: Signup now and earn!

Using BlockFi, don't just buy crypto - start earning on it. Open an interest account with up to 8.6% APY, trade currencies, or borrow money without selling your assets.

Join CoinBase
! We'll both receive $10 in free Bitcoin when they buy or sell their first $100 on Coinbase! Available in India also.
Use the referral Join coinbase!

Invest now!!! Get Free equity stock (US, UK only)!
Use Robinhood app to invest in stocks. It is safe and secure. Use the Referral link to claim your free stock when you sign up!.
The Robinhood app makes it easy to trade stocks, crypto and more.

Webull
! Receive free stock by signing up using the link: Webull signup.
More Related questions...