Merge pull request #883 from KeerthanaPravallika/KeerthanaP

Added Hierarchical Inheritance in java

Author: Saviour1001

OOPs/Inheritance/HierarchicalInheritance.java

@@ -0,0 +1,65 @@
+  
+/*
+    Inheritance : Inheritance in Java is a mechanism in which one object 
+                  acquires all the properties and behaviors of a parent object. 
+                  
+    Hierarchical Inheritance : When two or more classes inherits a single class, it is known as hierarchical inheritance. 
+    
+            class A
+               ^
+               |
+   -----------------------------
+   |                           |
+class B                      class B
+            
+                   
+*/
+
+class base_class
+{
+    int base_value;
+    base_class()          // constructor
+    {
+        base_value = 10;
+    }
+}
+
+class derived_class1 extends base_class    
+{
+    int derived_value;
+    derived_class1(int der_val)   // constructor
+    {
+        derived_value = der_val;
+    }
+    void display()
+    {
+        System.out.println("\nThis is derived class 1");
+        System.out.println("Base class variable value : "+ base_value);      // accessing base class variable
+        System.out.println("Derived class variable value : "+derived_value);
+    }
+}
+
+class derived_class2 extends base_class      
+{
+    int derived_value;
+    derived_class2(int der_val)   // constructor
+    {
+        derived_value = der_val;
+    }
+    void display()
+    {
+        System.out.println("\nThis is derived class 2");
+        System.out.println("Base class variable value : "+ base_value);      // accessing base class variable
+        System.out.println("Derived class variable value : "+derived_value);
+    }
+}
+public class Main
+{
+	public static void main(String[] args) {
+	    
+		derived_class1 obj1 = new derived_class1(20);  // creating derived class1 object
+		derived_class2 obj2 = new derived_class2(40);  // creating derived class2 object
+		obj1.display();
+		obj2.display();
+	}
+}