Hierarchical Inheritance

Multiple child classes derived from one base(super class) class is called Hierarchical inheritance.

class A{
 A(){
    System.out.println("I am class A's default constructor");
 }

 A(int a){
    System.out.println("I am class A's parameterized constructor";
 }
}

class B extends A{
 B(){
    System.out.println("I am class B's default constructor");
 }
 
 B(int a){
    System.out.println("I am class B's parameterized constructor";
 }
}

    

class C extends A{
 C(){
    System.out.println("I am class C's default constructor");
 }
 
 C(int a){
    System.out.println("I am class C's parameterized constructor";
 }
}

  

class D extends A{
 D(){
    System.out.println("I am class D's default constructor");
 }

 D(int a){
    System.out.println("I am class D's parameterized constructor");
 }
}

Multi Level Inheritance                                                 Multiple Inheritance                                                 Home