Searching any item in a list from another list using Java Streams [duplicate]

Question

I have 2 List list:

//Dynamic lists - sent in request
List<String> types = {"VCX", "ATCH", "Warrnty"};

//hardcoded eligble list in code
List<String> eligibleTypes = {"VCX", "ATCH", "Warrnty"};

Now I want to return true if any of the entries in types list is present in hardcoded eligibleTypes list? How can I write a clean code using Java streams?

boolean isAnyChildEligible = types.stream()
    .anyMatch(type -> isEligibleProgram(type, eligibleTypes));

private boolean isEligibleProgram(String type, List<String> eligibleTypes) {
    if(!CollectionUtils.isEmpty(eligibleTypes) && eligibleTypes.contains(type)) {
        return true;
    }
    return false;
}

Any better way of doing the above? Using some other method? Will the above even work?

which CollectionUtils you use here !CollectionUtils.isEmpty(eligibleTypes)? — Golam Mazid Sajib
– Golam Mazid Sajib, Commented Apr 20, 2020 at 8:56

sarath kumar · Accepted Answer · 2020-04-20 08:46:27Z

1

you can use the Collections method like below

Collections.disjoint(types, eligibleTypes)

returns true if no common element between list.

Hope this helps !!!

answered Apr 20, 2020 at 8:46

sarath kumar

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Comments

Eran · Accepted Answer · 2020-04-20 08:42:20Z

0

Assuming eligibleTypes can never be null, you can write this without the isEligibleProgram() method:

boolean isAnyChildEligible = types.stream().anyMatch(eligibleTypes::contains);

answered Apr 20, 2020 at 8:42

Eran

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