ArrayList是否删除重复项(使其唯一)？

import java.util.ArrayList;
import java.util.HashSet;

public class RemoveDuplicates {
    public static void main(String[] args) {
        ArrayList<Integer> originalList = new ArrayList<>();
        originalList.add(1);
        originalList.add(2);
        originalList.add(3);
        originalList.add(2);
        originalList.add(4);
        originalList.add(1);

        ArrayList<Integer> uniqueList = new ArrayList<>(new HashSet<>(originalList));

        System.out.println("Original List: " + originalList);
        System.out.println("Unique List: " + uniqueList);
    }
}

Original List: [1, 2, 3, 2, 4, 1]
Unique List: [1, 2, 3, 4]