How to update a list object where matching condition using java 8

Question

list --> Obj to iterate

    list.stream().filter(d -> { 
        if(d.getAvailableTodayInPerson() == true && d.getDistance() > dis) {
            d.setAvailableTodayInPerson(false);
            d.setAvailableTodayOutPerson(true);
        }
    });

you should not update the objects in the streaming pipeline. You can read more about this here docs.oracle.com/javase/8/docs/api/java/util/stream/Stream.html — Octavian R.
– Octavian R., Commented Dec 2, 2020 at 16:16

Suraj Gautam · Accepted Answer · 2020-12-02 16:39:56Z

3

It's simple actually. You can do something like this:

list.stream()
                .filter(d-> d.getAvailableTodayInPerson() == true && d.getDistance() > dis)
                .foreach(d -> {
                    d.setAvailableTodayInPerson(false);
                    d.setAvailableTodayOutPerson(true);
                });

edited Dec 2, 2020 at 16:39

answered Dec 2, 2020 at 16:35

Suraj Gautam

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1 Comment

Geosearchef Over a year ago

This changes the original list instead of just applying an update if the condition is matching. I'd remove the collection and assignment.

Abhishek · Accepted Answer · 2020-12-03 04:49:19Z

1

Do you mean?

list.stream().forEach(d -> {
     if(d.getAvailableTodayInPerson() == true && d.getDistance() > dis) {
            d.setAvailableTodayInPerson(false);
            d.setAvailableTodayOutPerson(true);
     }
 });

edited Dec 3, 2020 at 4:49

Abhishek

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answered Dec 3, 2020 at 2:02

EndlessUniverse

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