Creating object with reference to Interface

amitbhoraniya · amitbhoraniya · commit b70614efef80 · 2016-02-19T00:10:55.000+05:30
In Dao pattern DaoImpl object is created with reference to dao interface.
diff --git a/dao/src/main/java/com/iluwatar/dao/App.java b/dao/src/main/java/com/iluwatar/dao/App.java
@@ -29,7 +29,7 @@ public class App {
    * @param args command line args.
    */
   public static void main(final String[] args) {
-    final CustomerDaoImpl customerDao = new CustomerDaoImpl(generateSampleCustomers());
+    final CustomerDao customerDao = new CustomerDaoImpl(generateSampleCustomers());
     log.info("customerDao.getAllCustomers(): " + customerDao.getAllCustomers());
     log.info("customerDao.getCusterById(2): " + customerDao.getCustomerById(2));
     final Customer customer = new Customer(4, "Dan", "Danson");
