Book-Author-Person

Class Person:

PERSON.java
public class PERSON
{
private String name,diachi;
private char gioitinh;

public PERSON(String _name,String _diachi,char _gioitinh)
{
this.name=_name;
this.diachi=_diachi;
this.gioitinh=_gioitinh;
}

public String getName()
{
return name;
}

public char getGioitinh()
{
return gioitinh;
}
public String getDiachi()
{
return diachi;
}

public String toStringP()
{
return "\nTen:"+name+"\nDia chi:"+diachi+"\nGioi tinh:"+gioitinh;
}


}

Class: Author:

AUTHOR.java
public class AUTHOR extends PERSON
{
private String hocvi,chuyennganh;
public AUTHOR(String _name,char _gioitinh,String _diachi,String _hocvi,String _chuyennganh)
{
super(_name, _diachi, _gioitinh);
this.hocvi=_hocvi;
this.chuyennganh=_chuyennganh;
}

public String getHocvi()
{
return hocvi;
}

public void setHocvi(String _hocvi)
{
hocvi=_hocvi;
}

public String getChuyennganh()
{
return chuyennganh;
}

public String toString()
{
return toStringP()+"\nHoc vi:"+hocvi+"\nChuyen nganh:"+chuyennganh; 
}
}

Class Book:

 BOOK.java
 public class BOOK
 {
       private int isbn,sotrang;
       private String tensach,theloai,noidung;
       private double gia;
       private int count=0;

       private AUTHOR _author[]=new AUTHOR[3];

       public BOOK(int _isbn,int _sotrang,String _tensach,Double _gia,String _theloai,String _noidung)
       {
             this.isbn=_isbn;
             this.sotrang=_sotrang;
             this.tensach=_tensach;
             this.gia=_gia;
             this.theloai=_theloai;
             this.noidung=_noidung;
       }

       public void addAuthor(AUTHOR __author)
       {
             _author[count]=__author;
             count++;
       }

       public void printAuthor()
       {
             for (int i = 0; i < count; i++)
             {
                   System.out.println(_author[i]);
             }
       }

       public String toString()
       {
             return "\nISBN:"+isbn+"\nSo trang:"+sotrang+"\nTen sach:"+tensach+"\nGia:"+gia+"\nThe loai:"+theloai+"\nNoi dung:"+noidung;
       }

 }

Class Main:

Main.java
 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStreamReader;

 public class Main
 {
       public static void main(String[] args) throws IOException
       {
             BufferedReader in=new BufferedReader(new InputStreamReader(System.in));

             BOOK b1=new BOOK(123,321,"LTHDT",50000.0,"CNTT","CNTT");

             int soluongtg;
             System.out.println("Nhap so luong tac gia:");
             soluongtg=Integer.parseInt(in.readLine());

             String ten,dc,hv,cn;
             char gt;

             if (soluongtg <=3)
             {
                   for (int i = 1; i <= soluongtg; i++)
                   {
                         System.out.println("Nhap ten");
                         ten=in.readLine();
                         System.out.println("nhap gioi tinh");
                         String gt2=in.readLine();
                         gt=gt2.charAt(0);
                         System.out.println("dia chi");
                         dc=in.readLine();
                         System.out.println("Hoc vi");
                         hv=in.readLine();
                         System.out.println("chuyen nganh");
                         cn=in.readLine();

                         b1.addAuthor(new AUTHOR(ten,gt,dc,hv,cn));

                   }
             }
             else
                   System.out.println("Chi co the nhap 3 tac gia !");

             System.out.println(b1.toString());
             b1.printAuthor();
       }
 }

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