Java program to remove duplicate elements from an array

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public class RemoveDuplicates {
 
    public static void main(String[] args) {
        // Array with duplicate elements
        int[] arr = {1, 2, 3, 4, 2, 7, 8, 8, 3, 1};
 
        // Create a list from the array
        ArrayList<Integer> al = new ArrayList<>();
        for (int i : arr)
            al.add(i);
 
        // Remove duplicates
        ArrayList<Integer> newList = new ArrayList<>();
        for (Integer element : al) {
            if (!newList.contains(element)) {
                newList.add(element);
            }
        }
 
        // Finally iterate the list to print element.
        for (Integer element : newList) {
            System.out.print(element + " ");
        }
    }
}