Concurrent Modification exception

Question

I have this little piece of code and it gives me the concurrent modification exception. I cannot understand why I keep getting it, even though I do not see any concurrent mo

Answer 1

If the above solutions doesn't work properly. You can use old for-loop for iterating a List at the same time adding new items. See the example below:

import java.util.*;

public class SomeClass {
    public static void main(String[] args) {
        ArrayList aList = new ArrayList(); // we will iterate this


        // this will cause ConcurrentModificationException. 
        // Since we are iterating the list, at the same time modifying it.
        /*for(AClass a: aList){
           aList.add(someMethod(a));
        }*/

        // old fashion for-loop will help
        int limit = aList.size();
        for(int i=0; ctr