import java.util.ArrayList; public class Dosen extends id { private String nip; private ArrayList book; public Dosen( String Nama, String NIP, String Alamat, int Umur) { super(Nama, Alamat, Umur); nip= NIP; } public String getDosen() { return super.getNama(); } public void MeminjamBuku (Buku thebook) { book.add(thebook); } public void PengembalianBuku (Buku thebook) { book.remove(thebook); } public void print () { System.out.println ("NIP : "+nip); super.print(); for(Buku B: book) { System.out.println("Judul Buku : "+ B.getBuku()); } } public void printd() { System.out.println("NIP :" +nip); super.print(); } }