Ho to remove duplicate element in the List ?

Question

It seem to be very basic, but it not working, even I try different way.
This my List [10, 10, 11, 11, 12, 12, 13, 13, 14, 14],
now to remove duplicate elements to have at the end [10, 11, 12, 13, 14]
my code seem to be perfect but...
for(int i = 0; i < listA.size(); i++){
     if(i%2 == 0){
          System.out.println("ce i est un nombre pair "+i);
          listA.remove(i);
System.out.println(listA);

Answer 1

senore100 wrote:
The problem is that every single time an element is removed, the whole ArrayList is re-shuffled, with all the elements to the right moved to the left on spot. That's why.Yes, that's right. However if you had used an Iterator over the list, you could easily have removed every other element. It's only when you use an array index that you run into this (very common) problem.