fix: accessing newly added front() method, and changed output

Author: NirmalSilwal

CodingBlocks Training/Day17/QusingStackEnqEffClient.java

@@ -21,6 +21,7 @@ public static void main(String[] args) throws Exception {
 		System.out.println("\ndeleting element: " + queue.dequeue());
 		queue.display();
 
+		System.out.println("\nfront element is :" + queue.front());
 		System.out.println("\nsize of queue: "+ queue.size());
 	}
 
@@ -47,5 +48,7 @@ public static void main(String[] args) throws Exception {
 deleting element: 10
 20 >> 30 >> 40 >> 50 >> 
 
+front element is :20
+
 size of queue: 4
 */