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  1. ,
    via by Unknown author

    Causes : The Collection is internally modified, while a thread is iterating over it. OR after the creation of an iterator, the Collection is internally modified by any method other than the iterator’s own methods for removal and addition.

  2. ,
    via by Unknown author

    In order to avoid more than one threads accessing or modifying the same object, you can synchronize them over the object, in order to allow only one thread to manipulate it over time.

Solutions on the web

via Coderanch by Neil Veebrun, 1 year ago
via GitHub by FS1360472174
, 4 months ago
This exception has no message.
via Stack Overflow by Keval Pithva
, 1 year ago
via Stack Overflow by Rad
, 2 years ago
This exception has no message.
via Stack Overflow by Cian OT
, 9 months ago
java.util.ConcurrentModificationException at java.util.ArrayList$Itr.checkForComodification( at java.util.ArrayList$ at at at Client.printProducts( at Client.<init>( at Main.main(