Java / Concurrent collections
I have one List of Map like - List> list = new ArrayList>();
I want to return the Key if any value passed by user is equal to the value present in Map using Java 8 .
One way to doing is -
Map data = new HashMap<>();
list.stream().forEach(map -> {
data.putAll(map.entrySet().stream()
.collect(Collectors.toMap(entry -> entry.getKey(), entry -> (String) entry.getValue())));
});
String result = data.entrySet().stream()
.filter(map -> "def".equals(map.getValue()))
.map(map -> map.getKey())
.collect(Collectors.joining());
But I want to do to it without using collect().
Please help me on that.
Thank you.
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...
