diff --git a/Screenshots/program16.png b/Screenshots/program16.png
new file mode 100644
index 0000000..c18472b
Binary files /dev/null and b/Screenshots/program16.png differ
diff --git a/TestJavaCollection7.java b/TestJavaCollection7.java
new file mode 100644
index 0000000..22db1e2
--- /dev/null
+++ b/TestJavaCollection7.java
@@ -0,0 +1,15 @@
+// 16 write a java program to demonstrate HashSet
+import java.util.*;
+public class TestJavaCollection7{
+  public static void main(String args[]){
+    HashSet<String> set = new HashSet<String>();
+    set.add("Ravi");
+    set.add("Vijay");
+    set.add("Ravi");
+    set.add("Ajay");
+    Iterator<String> itr = set.iterator();
+    while(itr.hasNext()){
+      System.out.println(itr.next());
+    }
+  }
+}