Java, getting an ArrayList index by object

Question

so I have hit a little problem in my code I have:

synchronized(clients)
            clients.remove(this);
}

for when a client disconnects, but now I need to be able to send the name of that client to all the other clients, and to do this I essentialy need to do something like

synchronized(clients)
            broadcast("Remove:"+clients.get(this).name);
            clients.remove(this);
}

but obviously I can't get an index with the "this", so how do I go about getting the right clients name? Thanks!

i think you want to remove object from list. why do u need to get index.simply u cam use list.remove(object); or list.remove(inndex); — Mohammod Hossain
– Mohammod Hossain, Commented Sep 1, 2012 at 5:08

Ankur · Accepted Answer · 2012-09-01 15:59:16Z

13

why don't you simply use this.name? As you already have the object why do you need to get the index to again get the object?

Edit:

To answer the question in the title(to get index of the object) use indexOf

edited Sep 1, 2012 at 15:59

answered Sep 1, 2012 at 5:01

Ankur

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1 Comment

Jeremy Sayers Over a year ago

You sir, are correct, I have to stop doing late night programming hahahah!

randominstanceOfLivingThing · Accepted Answer · 2012-09-01 05:19:13Z

5

Did you look at the indexOf function in ArrayList?

answered Sep 1, 2012 at 5:19

randominstanceOfLivingThing

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Comments

MadProgrammer · Accepted Answer · 2012-09-01 05:19:57Z

3

int index = clients.indexOf(this);
// Do what ever...
clients.remove(index); // or clients.remove(this);

answered Sep 1, 2012 at 5:19

MadProgrammer

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Comments

kleopatra · Accepted Answer · 2012-09-01 09:02:22Z

-1

I think you want to remove specific object from list. If you get index from your code

int index = clients.get(this)

Then you can remove easily

clients.remove(index);

or if you get object from list then remove

clients.remove(object) // remove by object

edited Sep 1, 2012 at 9:02

kleopatra

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answered Sep 1, 2012 at 5:13

Mohammod Hossain

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