Initial data commit

Task/Remove-duplicate-elements/Java/remove-duplicate-elements-4.java

@@ -0,0 +1,12 @@
+import java.util.*;
+
+class Test {
+
+    public static void main(String[] args) {
+
+        Object[] data = {1, 1, 2, 2, 3, 3, 3, "a", "a", "b", "b", "c", "d"};
+        Set<Object> uniqueSet = new HashSet<Object>(Arrays.asList(data));
+        for (Object o : uniqueSet)
+            System.out.printf("%s ", o);
+    }
+}