Constructors in Inheritance

How Constructors Work in Inheritance

When a subclass object is created, constructors of both parent and child are involved:

• Parent class constructor executes first.
• super() is implicitly added in every constructor of sub class.
• Child class constructor executes next.

• This ensures that parent class fields are initialized before child class fields.

• Java compiler does not implicitly call parameterized parent class constructor unless we insert super(args) in subclass constructors.

• If parent has only parameterized constructors, child must explicitly call one using super(args).

• If you explicitly write super(args), then the compiler will NOT add super().
  Case 1
  

Case 2:

Case 3:

Case 4:

Case 5

Case 6:

Case 7:Explicitly super(args) written

Case 8 :If parent has only parameterized constructors, child must explicitly call one using super(args).