Arraylist iterators error

Question

Hi all,
i've got an issue when I try to remove an element from an ArrayList during an iterator, the code is:
for (int i: array)
{if (i == x)
{ array.remove(i); *the compiler check the error here
System.out.println("Elemento" + x + " rimosso dalla posizione: " + i);
break;
}
else
System.out.println("Non esiste questo elemento");

The error is: Exception in thread "main" java.lang.IndexOutOfBoundsException

My question is, can I remove an element using a iterator like:
for ( i : array)
{}
?
Thank you.

Answer 1

Oh you cant do it like that, here is why
for example you have an arraylist with data {5,6,9}
then using foreach loop like that
for(int i : x)
In foreach i become the value in x each iteration, so at the first iteration i is 5, now you try to remove it with remove() method which take an index as parmeter.
That means x.remove(5); its out of bounds, the size of x is 3 but i try to remove the 6th element. That's why i throw an error

To resolve this you can use the traditional for loop
Or get the index first by using indexOf() method

Answer 2

Ok, Got it.
Thank you!