Java ArrayList errors caused by iterators when emptying elements

In headfirst Java, example: attacking web games

The code provided in the book to check if the target was hit:

for (DotCom dotcomtotest:dotcomslist) {result = Dotcomtotest.checkyourself (userguess), if (Result.equals ("hit")) { break;} else if (Result.equals ("Kill")) {Dotcomslist.remove (dotcomtotest);

The target list is traversed in the same way as the iterator used, but an error occurs during execution.

Error type: Java.util.abstractlist$itr.next ()

Because the elements in the ArrayList are emptied, resulting in an error in the iterator

A variety of situations can be consulted

http://lggege.iteye.com/blog/249430

Code FIX:

for (int i = 0; i < dotcomslist.size (); i + +) {result = Dotcomslist.get (i). Checkyourself (userguess); if (Result.equals ("H It ")) {break;} else if (Result.equals ("Kill")) {dotcomslist.remove (i); break;}}

Java ArrayList errors caused by iterators when emptying elements