Class con nguoi

import java.util.Date;

import java.util.Scanner;

public class ConNguoi{

    public String ten;

    public String gioiTinh;

    public Date namSinh;

    public String diaChi;

    public String sdt;

    public ConNguoi(){

       ;

       ;

        namSinh=new Date();

       ;

       ;

    }   

    public ConNguoi(ConNguoi a) {

        this.ten=a.ten;

        this.gioiTinh=a.gioiTinh;

        this.namSinh=a.namSinh;

        this.diaChi=a.diaChi;

        this.sdt=a.sdt;

    }   

    public void nhap(){

        Scanner sc=new Scanner(System.in);

        System.out.println("Nhap ten: ");

        ten=sc.nextLine();

        System.out.println("Nhap gioi tinh: ");

        gioiTinh=sc.nextLine();

        System.out.println("Nhap nam sinh: ");

        namSinh=new Date(sc.nextLine());

        System.out.println("Nhap dia chi: ");

        diaChi=sc.nextLine();

        System.out.println("Nhap so dien thoai: ");

        sdt=sc.nextLine();

    }   

    public void xuat() {

        System.out.println("Ten: "+ten);

        System.out.println("Gioi tinh: "+gioiTinh);

        System.out.println("Nam sinh: "+namSinh);

        System.out.println("Dia chi: "+diaChi);

        System.out.println("So dien thoai: "+sdt);

    }

}

Class Khach hang

import java.util.Date;

import java.util.Scanner;

public class KhachHang extends ConNguoi{

    public String maKH;

    public Date ngayDatPhong;

    public Date ngayTraPhong;

    public String soPhongdat;

    public String Cmnd;

    public KhachHang(){

        super();

       ;

        ngayDatPhong=new Date();

        ngayTraPhong=new Date();

        soPhongdat="";

       ;

    }

    public KhachHang(KhachHang a) {

        super(a);

        this.maKH=a.maKH;

        this.ngayDatPhong=a.ngayDatPhong;

        this.ngayTraPhong=a.ngayTraPhong;

        this.soPhongdat=a.soPhongdat;

        this.Cmnd=a.Cmnd;

    } 

    public void nhap(){

        super.nhap();

        Scanner sc=new Scanner(System.in);

        System.out.println("Nhap ma khach hang: ");

        maKH= sc.nextLine();

        System.out.println("Nhap ngay dat phong: ");

        ngayDatPhong=new Date(sc.nextLine());

        System.out.println("Nhap ngay tra phong:");

        ngayTraPhong=new Date(sc.nextLine());

        System.out.println("Nhap so phong dat: ");

        soPhongdat=sc.nextLine();

        System.out.println("Nhap so chung minh nhan dan: ");

        Cmnd=sc.nextLine();

    }

    public void xuat() {

        super.xuat();

        System.out.println("Ma khach hang: "+maKH);

        System.out.println("Ngay dat phong: "+ngayDatPhong);

        System.out.println("Ngay tra phong:"+ngayTraPhong);

        System.out.println("So phong dat: "+soPhongdat);

        System.out.println("So Chung minh nhan dan: "+Cmnd);

    }

}

Class nhan vien

import java.util.Date;

import java.util.Scanner;

public abstract class NhanVien extends ConNguoi{

    public String maNV;

    public Date ngayVL;

    public long luong;

    public NhanVien(){

        super();

       ;

        ngayVL=new Date();

        luong=0;

    }   

    public NhanVien(NhanVien a) {

        super(a);

        this.maNV=a.maNV;

        this.ngayVL=a.ngayVL;

        this.luong=a.luong;

    }   

    public void nhap(){

       super.nhap();

       Scanner sc=new Scanner(System.in);

       System.out.println("Nhap ma nhan vien: ");

       maNV=sc.nextLine();

       System.out.println("Nhap ngay vao lam: ");

       ngayVL=new Date(sc.nextLine());

       System.out.println("Nhap luong can ban: ");

       luong=sc.nextLong();

       sc.nextLine();

    }   

    public void xuat() {

        super.xuat();

        System.out.println("Ma nhan vien: "+maNV);

        System.out.println("Ngay vao lam: "+ngayVL);

        System.out.println("Luong can ban: "+luong);

    }   

    public String loaiNV(){

        return "";

    }

    abstract public void nhapLuong();   

    abstract public long luong();

}

Class nhan vien QL

import java.util.Date;

import java.util.Scanner;

public abstract class NhanVien extends ConNguoi{

    public String maNV;

    public Date ngayVL;

    public long luong;

    public NhanVien()    {

        super();

       ;

        ngayVL=new Date();

        luong=0;

    }   

    public NhanVien(NhanVien a) {

        super(a);

        this.maNV=a.maNV;

        this.ngayVL=a.ngayVL;

        this.luong=a.luong;

    }

    public void nhap(){

       super.nhap();

       Scanner sc=new Scanner(System.in);

       System.out.println("Nhap ma nhan vien: ");

       maNV=sc.nextLine();

       System.out.println("Nhap ngay vao lam: ");

       ngayVL=new Date(sc.nextLine());

       System.out.println("Nhap luong can ban: ");

       luong=sc.nextLong();

       sc.nextLine();

    }   

    public void xuat() {

        super.xuat();

        System.out.println("Ma nhan vien: "+maNV);

        System.out.println("Ngay vao lam: "+ngayVL);

        System.out.println("Luong can ban: "+luong);

    }   

    public String loaiNV() {

        return "";

    }

    abstract public void nhapLuong();

    abstract public long luong();

}

Class nhan vien thuong

import java.util.Date;

import java.util.Scanner;

public abstract class NhanVien extends ConNguoi{

    public String maNV;

    public Date ngayVL;

    public long luong;

    public NhanVien(){

        super();

       ;

        ngayVL=new Date();

        luong=0;

    }

    public NhanVien(NhanVien a)    {

        super(a);

        this.maNV=a.maNV;

        this.ngayVL=a.ngayVL;

        this.luong=a.luong;

    }   

    public void nhap(){

       super.nhap();

       Scanner sc=new Scanner(System.in);

       System.out.println("Nhap ma nhan vien: ");

       maNV=sc.nextLine();

       System.out.println("Nhap ngay vao lam: ");

       ngayVL=new Date(sc.nextLine());

       System.out.println("Nhap luong can ban: ");

       luong=sc.nextLong();

       sc.nextLine();

    }

    public void xuat()

    {

        super.xuat();

        System.out.println("Ma nhan vien: "+maNV);

        System.out.println("Ngay vao lam: "+ngayVL);

        System.out.println("Luong can ban: "+luong);

    }   

    public String loaiNV()

    {

        return "";

    }

    abstract public void nhapLuong();   

    abstract public long luong();

}

Class phong

import java.util.Scanner;

public class Phong {

    public String soPhong;

    public String lau;

    public String loaiPhong;

    public long gia;

    public String thue;

    public Phong(){

       ;

       ;

       ;

        gia=0;

       ;

    }

    public Phong(Phong a) {

        this.soPhong=a.soPhong;

        this.lau=a.lau;

        this.loaiPhong=a.loaiPhong;

        this.gia=a.gia;

        this.thue=a.thue;

    }

    public void nhap() {

        Scanner sc=new Scanner(System.in);

        System.out.println("Nhap so phong: ");

        soPhong=sc.nextLine();

        System.out.println("Nhap lau thu: ");

        lau=sc.nextLine();

        System.out.println("Nhap loai phong (VIP,thuong): ");

        loaiPhong=sc.nextLine();

        System.out.println("Nhap gia phong (1 ngay): ");

        gia=sc.nextLong();

        sc.nextLine();

        System.out.println("Thue (chua thue,da thue): ");

        thue=sc.nextLine();                

    }

    public void xuat() {

        System.out.println("So phong: "+soPhong);

        System.out.println("Lau thu: "+lau);

        System.out.println("Loai phong: "+loaiPhong);

        System.out.println("Gia phong(1 ngay): "+gia);

        System.out.println("Phong: "+thue);

    }

}

Class Quan ly

import java.util.Scanner;

public class QuanLy{

    NhanVien dsNV[];

    KhachHang dsKH[];

    Phong dsP[];

    int soNV;

    int soKH;

    int soP;

    Scanner sc= new Scanner(System.in);

    public QuanLy(int m) {

        dsNV= new NhanVien[m];

        dsKH= new KhachHang[m];

        dsP= new Phong[m];

    }   

    public void hienThiDSNV(){

        for(int i=0; i<soNV; i++) {

        this.dsNV[i].xuat();

        System.out.println("Tong tien luong: "+dsNV[i].luong());

        System.out.println();

        }

    }

    public void hienThiDSKH(){

        for(int i=0; i<soKH; i++) {

        this.dsKH[i].xuat();

        System.out.println();

        }

    }

    public void hienThiDSP(){

        for(int i=0; i<soP; i++) {

        this.dsP[i].xuat();

        System.out.println();

        }

    }

    public void timNV(String manv){

      for(int i=0; i<soNV; i++)

          if(dsNV[i].maNV.equals(manv))

              dsNV[i].xuat();

    }

    public void timKH(String makh) {

      for(int i=0; i< soKH; i++)

          if(dsKH[i].maKH.equals(makh))

              dsKH[i].xuat();

    }

    public void timP(String sophong){

        for(int i=0; i<soP; i++)

            if(dsP[i].soPhong.equals(sophong))

                dsP[i].xuat();

    }

    public void them(KhachHang t) {

      t.nhap();

      this.dsKH[soKH]= t;

      soKH= soKH+1;

    }

    public void them(NhanVien t)  {

      t.nhap();

      this.dsNV[soNV]= t;

      soNV=soNV+1;

    }

    public void them(Phong t){

        t.nhap();

        this.dsP[soP]= t;

        soP=soP+1;  

    } 

}