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();  } }