Do not know how to use no-argument constructor and an argument constructor

Question

Hi everyone,
I'm working on a project that asked in the code to have one no-argument constructor and one argument constructor, but I don't know how to add it with the code I've already written.
Would someone know how to do this?

https://code.sololearn.com/cO0cuOnBRqp3/#java

Answer 1

Constructor methods should be written with same name as the containing class and are automatically triggered when we create a new object of that class.
In your case an example would be

Book(){
System.out.println("new Book object");
}
Book(String title){
System.out.println("new book with title"+ title);
}

Answer 2

Just like that:
(for book class)

public Book(){

}
public Book(/* argumnets */){

}

Answer 3

Aleksei Radchenkov thank you for your help. I was able to figure it out

Answer 4

_rk Thank you for answering. I got it!