Details about implicit constructor in java with example

Question

I want a clarification for this statement related to implicit constructor in Java. I read this statement in an article but I need more details about it and an example to understand it.

The statement is: An implicit constructor call is made when a variable of type B is defined and instantiated in class A, for example, B b = new B().

Answer 1

Its basically saying that any class that is instantiated has an implicit constructor:

public class B {

    //constructor       
    public B() {
        //implicity constructor
    }

}

public class A {

    //constructor       
    public A() {
         Bb = new B(); //calls the constructor inside B during setup even if the constructor method does not exist within B an implicit constructor is made
    }

}

The default constructor is the no-argument constructor automatically generated unless you define another constructor. It initialises any uninitialised fields to their default values. link

When B is instantiated from A this constructor is called during its creation basically. For more specific details you should really ask in a different exchange than stack-overflow maybe try the programmers section.