Synchronized using for Methods in Java? -

Synchronized using for Methods in Java? -

i need know usage of synchronized using methods in java.please see below code once.

code :

public void updateallusersstatus(userdetails userdetails) { for(player p : userdetails.getplayerslist()) { if(p != null) { string userid = p.getuserid(); updateuserstatus(userid ); } } } public synchronized void updateuserstatus(string name) { //here update status of user in db. }

the above code used synchronizedfor method.is there possibility of getting java.util.concurrentmodificationexception using synchronized above updateuserstatus()?

can please suggest me utilize of synchronized using above method?.

thanks in advance.

if updateuserstatus modifies list of players stored in userdetails object, next iteration of loop in updateallusersstatus may throw concurrentmodificationexception because player list modified (by updateuserstatus) while it's beingness iterated (by updateallusersstatus). synchronized keyword doesn't help: protects against concurrent execution in different threads, doesn't prevent individual thread modifying list while same thread iterating it.

your code looks strange, though, , suspect has other problems: you're iterating list of players stored in userdetails, don't do individual player objects. phone call updateuserstatus multiple times on same userdetails object. did intend updateuserstatus take player argument instead of userdetails? if so, should safe, since individual player (presumably) can't modify list of other players.

java