solves comtains duplicate

Author: anishLearnsToCode

src/ContainsDuplicate.java

@@ -0,0 +1,15 @@
+import java.util.HashSet;
+import java.util.Set;
+
+public class ContainsDuplicate {
+    public static boolean containsDuplicate(int[] array) {
+        Set<Integer> elements = new HashSet<>();
+        for (int element : array) {
+            if (elements.contains(element)) {
+                return true;
+            }
+            elements.add(element);
+        }
+        return false;
+    }
+}