Hierarchical Inheritance Example

/*Class A is a parent class of both class B and class C i.e one Parent class has many sub classes.
And this is the concept of Hierarchical Inheritance.*/
//A.java
public class A
{
void DisplayA()
{
System.out.println("I am in A");
}
}

//B.java
public class B extends A
{
void DisplayB()
{
System.out.println("I am in B");
}
}

/c.java
public class C extends A
{
void DisplayC()
{
System.out.println("I am in C");
}
}

//MainClass.java
public class MainClass
{
public static void main(String args[])
{
System.out.println("Calling for subclass C");
C c = new C();
c.DisplayA();
c.DisplayC();

System.out.println("Calling for subclass B");
B b = new B();
b.DisplayA();
b.DisplayB();
}
}

Output =>
Calling for subclass C
I am in A
I am in C
Calling for subclass B
I am in A
I am in B