import java.util.Arrays;import java.util.HashSet;public class Solution { public boolean containsDuplicate(int[] nums) { Integer[] array = new Integer[nums.length]; for (int i = 0; i < nums.length; i++) array[i] = new Integer(nums[i]); HashSet<Integer> hs = new HashSet<Integer>(); hs.addAll(Arrays.asList(array)); return hs.size() < nums.length; }}
