Java stream map call another constructor

Question

I am trying to use java stream instead of forloop

ids.stream().map(AccountPermissionsUpdate::new)

I have created an other constructor, my question is: how to call the second constructor

new AccountPermissionsUpdate(id,true)

Thanks

public AccountPermissionsUpdate(long accountId) {
        this.accountId = accountId;
    }

public AccountPermissionsUpdate(long accountId, boolean forcedLogout) {
        this.accountId = accountId;
        this.forcedLogout = forcedLogout;
}

Just a side note (learned from Josh Bloch's book Effective Java), stream api is not a replacement for for loops, so be careful as it creates many stream instances in between. You can read more about that in his book though — Ketan, Nov 16 '18 at 05:06

Jignesh M. Khatri · Answer 1 · 2018-11-16T04:57:47.873

2

Try out below code:

ids.stream().map(element -> new AccountPermissionsUpdate(element,true));

edited Nov 16 '18 at 04:57

answered Nov 16 '18 at 04:54

Jignesh M. Khatri

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Wow you are fast, but the `id` seem not correct here, should be `element`? – Dang Nguyen Nov 16 '18 at 04:57
1

Yes. My bad. It should be element. I will update my answer. I just copied and pasted your code from your question, that's didn't notice that. – Jignesh M. Khatri Nov 16 '18 at 04:57

score 2 · Accepted Answer · answered Nov 16 '18 at 04:55

2

ids.stream().map(id -> new AccountPermissionsUpdate(id, true));

You will call it like this.

answered Nov 16 '18 at 04:55

Dang Nguyen

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Java stream map call another constructor

2 Answers2