Java stream map call another constructor [duplicate]

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
– Ketan, Commented Nov 16, 2018 at 5:06

Dang Nguyen · Accepted Answer · 2018-11-16 04:55:43Z

2

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

You will call it like this.

answered Nov 16, 2018 at 4:55

Dang Nguyen

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Jignesh M. Khatri · Accepted Answer · 2018-11-16 04:57:47Z

2

Try out below code:

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

edited Nov 16, 2018 at 4:57

answered Nov 16, 2018 at 4:54

Jignesh M. Khatri

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2 Comments

Dang Nguyen Over a year ago

Wow you are fast, but the id seem not correct here, should be element?

Jignesh M. Khatri Over a year ago

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.

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