Using default constructor in inheritance and in what reason it throws error?

Answer 1

The compiler places a default no-arg constructor in any java class that does not have an explicit constructor coded into it.

for ex:

public class Car {

...

...

//lots of code but no constructor

}

In the above case, the compiler will place the below constructor into the code:

public Car() {

super();

}

But, if you have a constructor in your class that takes arguments then the compiler will not put the default constructor.

Ex:

public class Car {

public Car(String name){

...

}

...

//lots of code

}

Above, we have a Car constructor that takes a string name as argument. so, the compiler wont put the default constructor in the code.

now, if you try to do:

Car obj = new Car();

you will get an error because this constructor is not defined.