Enhance Test.java with Dog class example

1. Java Basics Tutorial/21. Inheritance/src/Single_Inheritance/Test.java

@@ -2,7 +2,18 @@
 
 public class Test {
   public static void main(String[] args) {
+    // Creating an instance of Dog class 
+    Dog dog = new Dog("Buddy",5);  // Initializing the dog with name "Buddy" and age 5
+
+    // Displaying the dog's name and age using getter methods
+    System.out.println("Dog's name: "+dog.getName());  
+    System.out.println("Dog's age: "+dog.getAge());
+
+    //Calling the sayHello() method of the dog. Since it has overridden the method of the Animal class, it will print "Wolf"
+    dog.sayHello();  // Output: Wolf
+
+    // Calling the eat() method of the dog. Since Dog class doesn't override eat() method of the Animal class, so Animal class's eat() will be called
+    dog.eat(); // Output: This animal eats food.
 
   }
-
 }