Exception in thread “AWT-EventQueue-0” java.util?

If you have more then one thread working that could be working with the layerlist, you should consider using a synchronize block as an example below. That will help prevent this problem or you could consider having the layerList be synchronized but with out more info of the program and the thread structure it is hard to tell you what is best. Check out this synchronized list as an option instead of the synchronized block.

If you have more then one thread working that could be working with the layerlist, you should consider using a synchronize block as an example below. That will help prevent this problem or you could consider having the layerList be synchronized but with out more info of the program and the thread structure it is hard to tell you what is best. Check out this synchronized list as an option instead of the synchronized block.

Synchronized( layerList ) { for(Layer e : layerList) e. DrawLayer(g2); }.

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