Create Addition-using-hashtable.java (#368)

Here's a solution to opened issue create hashtable folder and a simple hashtable program

Author: Aman5989

Hashtable/Addition-using-hashtable.java

@@ -0,0 +1,32 @@
+import java.io.*;
+import java.util.*;
+  
+class AddElementsToHashtable {
+    public static void main(String args[])
+    {
+        // No need to mention the
+        // Generic type twice
+        Hashtable<Integer, String> ht1 = new Hashtable<>();
+  
+        // Initialization of a Hashtable
+        // using Generics
+        Hashtable<Integer, String> ht2
+            = new Hashtable<Integer, String>();
+  
+        // Inserting the Elements
+          // using put() method
+        ht1.put(1, "Geeks");
+        ht1.put(2, "For");
+        ht1.put(3, "Geeks");
+  
+        ht2.put(1, "Geeks");
+        ht2.put(2, "For");
+        ht2.put(3, "Geeks");
+          
+          // Print mappings to the console
+        System.out.println("Mappings of ht1 : " + ht1);
+        System.out.println("Mappings of ht2 : " + ht2);
+    }
+}
+ 
+