java – Problem with Abstract Class on OCA certification

Question:

!Good!

I'm studying, and preparing for the Java 8 OCA certification. There is an example question that I don't quite understand… Which gives me this piece of code:

abstract class Writer {
 public static void write() {
 System.out.println("Writing...");
 }
}
class Author extends Writer {
 public static void write() {
 System.out.println("Writing book");
 }
}
public class Programmer extends Writer {
 public static void write() {
 System.out.println("Writing code");
 }
 public static void main(String[] args) {
 Writer w = new Programmer();
 w.write();
 }
}

And I have to choose the correct answer among these, to know what the result of the program would be:

A) Writing… B) Writing book C) Writing code D) Compilation fails.

According to the results provided by Oracle, the correct one would be A .

But why?

I thought it was C , but apparently not…

EDIT

I answer the C , because in the main although a Writer class object is being created, a Programmer type is being stored, and for this reason it should take the Writing code . Although it is true that the methods do not have @override , but I did not know to what extent it can influence.

Answer:

By creating an instance of Programmer and calling the write() method,

 Writer w = new Programmer();
 w.write();

The Programmer class extends the Writer class which contains a static method, which in this case cannot be overloaded, so this will be the message to print.

abstract class Writer {
    public static void write() {
        System.out.println("Writing...");
    }
}

Exit:

Writing...

Therefore, the answer is A)

In the case where the write() methods were not static, the output would be

Writing code

---

the Author class is not used:

class Author extends Writer {

    public static void write() {
        System.out.println("Writing book");
    }
}