contains duplicate

Author: se6816

contains-duplicate/se6816.java

@@ -0,0 +1,15 @@
+/**
+Problem 217 : contains duplicate
+Summary : 주어진 배열에서 중복이 있으면 true, 없으면 false
+
+*/
+
+class Solution {
+    public boolean containsDuplicate(int[] nums) {
+        long count = Arrays.stream(nums)
+                        .distinct()
+                        .count();
+        
+        return count != nums.length;
+    }
+}