check arraylist from the beginning after remove an element

IMBABOT :

Got a List of elements:

String[] temp = new String[]{"NORTH", "SOUTH", "SOUTH", "EAST", "WEST", "NORTH", "WEST"};
ArrayList<String> list = new ArrayList<>(Arrays.asList(temp));

I need return to begining of the loop after removing elements from ArrayList

removing elements "NORTH" and "SOUTH" if they consecutive:

for (int i = 0; i < list.size() - 1 ; i++) {

    if (list.get(i).equals("NORTH") && list.get(i + 1).equals("SOUTH")) {
        list.remove(i);
        list.remove(i);
    }
    if (list.get(i).equals("SOUTH") && list.get(i + 1).equals("NORTH")) {
        list.remove(i);
        list.remove(i);
    }

the above code delete elements "NORTH" and "SOUTH", and continue check elements but with this condition:

    if (list.get(i).equals("SOUTH") && list.get(i + 1).equals("NORTH")) {
        list.remove(i);
        list.remove(i);
    }

I need to back to the first condition after delete elements.

How to do it?

QuantumDeveloper :

The simplest way would be to reduce i by 1 and the continue the loop, so in the next round, when i gets incremented, you are back at the first if and i is the same as before:

for (int i = 0; i < list.size() - 1 ; i++) {
    if (…) {
        list.remove(i);
        list.remove(i);
        i--;
        continue;
    }
    if (…) {
        list.remove(i);
        list.remove(i);
        i--;
        continue;
    }
}

Or if you don't want to use the continue statement you can use an else-if so the second condition won't be executed for i-1:

for (int i = 0; i < list.size() - 1 ; i++) {
    if (…) {
        list.remove(i);
        list.remove(i);
        i--;
    }
    else if (…) {
        list.remove(i);
        list.remove(i);
        i--;
    }
}