Error

Question

When i build this data object model below in Java programming i ran into a bunch of errors! what's wrong?

You can try this code on the sololearn integreted code editor and see what the hell occurs

The Code

public class Book {
// FIELDS
public String id;
public String name;
public String author_id;

public class Author {
// FIELDS
public String id;
public String name;
public String birthDay;

// RESOLVERS
public static String getAuthorId(){
return id;
}
public static String getName(){
return name;
}
public static String birthDay(){
return birthDay;
}
}
// RESOLVERS
public static String getBookId(){
return id;
}
public static String getBookName(){
return book;
}
public static String getAuthor(){
Author a = new Author();

}
}

Answer 1

where is the code??

Answer 2

Static members belong to the whole class and not to a specific instance of a class.

Answer 3

Got it. Thanks!

Answer 4

Mouad Taoussi The code?
That didn't help at all. Please share with us the actual code that you wrote and ran into a specific problem.

Answer 5

sorry i went wrong! here is the code above

Answer 6

you must remove *static* from methods
https://code.sololearn.com/cMmCtI8Mlufp/?ref=app

Answer 7

it works! but why we have to delete static in this instance?