Java streams on List<Object> get a property of any object matching filter()

Question

I want to get the property of any object matching the filter() of the stream, but I am unable to.

transactionsList.stream()
    .filter(transaction -> transaction.getPayerIban() != null)
    .findFirst()
    //Here I get an Optional<Object>
    .ifPresent()
    .map(Transaction::getName)

I don't know what to do inside the .ifPresent() stream operation, but I want to get any transaction name of the matching transactions

Andy Turner · Accepted Answer · 2019-08-02 15:27:04Z

2

Remove the ifPresent():

Optional<String> optionalName = transactionsList.stream()
    .filter(transaction -> transaction.getPayerIban() != null)
    .findFirst()
    .map(Transaction::getName);

answered Aug 2, 2019 at 15:27

Andy Turner

141k11 gold badges169 silver badges263 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Andy Turner Over a year ago

(From one Andy T to another...)

Collectives™ on Stack Overflow

Java streams on List<Object> get a property of any object matching filter()

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related