arr[i] = i = 30;

public class Main {

    public static void main(String[] args) {
        int i = 0;
        int[] arr = { 10, 20 };
        arr[i] = i = 30; // ???
        for (int a : arr) {
            System.out.println(a);
        }
    }
}

/*
Explanation:
arr[i] = i = 30;
arr[0] = i = 30;
i = 30; arr[0] = i;
arr[0] = 30;
*/