Latihan inheritance

Saya akan membuat 1 class sebagai parent (Database), 6 class sebagai child (Mahasiswa, Kelas, Matkul, Dosen, Buku, dan Pegawai), dan 1 class (TestDatabase).

Gambaran Class

1. Source Code Database

 public class Database  
 {  
   private String nama;  
   private String id;  
   public Database (String n, String i)  
   {  
     nama = n;  
     id =i;  
   }  
   public String toString ()  
   {  
     return "Database[nama=" + nama + ",id=" + id + "]";  
   }  
 }

2. Source Code Mahasiswa

 public class Mahasiswa extends Database  
 {  
   private String jurusan;  
   private String alamat;  
   private String agama;  
   public Mahasiswa (String n, String i, String j, String a1, String a2)  
   {  
     super (n,i);  
     jurusan = j;  
     alamat = a1;  
     agama = a2;  
   }  
   public String toString()  
   {  
     return "Mahasiswa[super=" + super.toString() + ",jurusan=" + jurusan + ",alamat=" + alamat + ",agama=" + agama + "]";  
   }  
 }

3. Source Code Kelas


 public class Kelas extends Database  
 {  
   private int totalSiswa;  
   public Kelas (String n, String i, int t)  
   {  
     super (n,i);  
     totalSiswa = t;  
   }  
   public String toString ()  
   {  
     return "Kelas[super=" + super.toString() + ",totalSiswa=" + totalSiswa + "]";  
   }  
 }

4. Source Code Matkul


 public class Matkul extends Database  
 {  
   private String semester;  
   public Matkul (String n, String i, String s)  
   {  
     super(n,i);  
     semester = s;  
   }  
   public String toString()  
   {  
     return "Matkul[super=" + super.toString() + ",semester=" + semester + "]";  
   }  
 }

5. Source Code Dosen

 
 public class Dosen extends Database  
 {  
   private String bidang;  
   private String alamat;  
   private String agama;  
   public Dosen (String n, String i, String b, String a1, String a2)  
   {  
     super (n,i);  
     bidang = b;  
     alamat = a1;  
     agama = a2;  
   }  
   public String toString()  
   {  
     return "Dosen[super=" + super.toString() + ",bidang=" + bidang + ",alamat=" + alamat + ",agama=" + agama + "]";  
   }  
 }

6. Source Code Buku

 
 public class Buku extends Database  
 {  
   private String penulis;  
   private int tahun;  
   public Buku (String n, String i, String p, int t)  
   {  
     super(n,i);  
     penulis = p;  
     tahun = t;  
   }  
   public String toString()  
   {  
     return "Buku[super=" + super.toString() + ",penulis=" + penulis + ",tahun=" + tahun + "]";  
   }  
 }

7. Source Code Pegawai

 
 public class Pegawai extends Database  
 {  
   private String alamat;  
   private String agama;  
   public Pegawai (String n, String i, String a1, String a2)  
   {  
     super(n,i);  
     alamat = a1;  
     agama = a2;  
   }  
   public String toString()  
   {  
     return "Pegawai[super=" + super.toString() + ",alamat=" + alamat +",agama=" + agama + "]";  
   }  
 }

8. Source Code TestDatabase

 
 public class TestDatabase  
 {  
   public static void main (String[] args)  
   {  
     Mahasiswa a1 = new Mahasiswa ("test1","05111740000001","Informatika","Asrama ITS","Islam");  
     Mahasiswa a2 = new Mahasiswa ("test2","05111740000002","Informatika","Kejawan Gebang","Islam");  
     Mahasiswa a3 = new Mahasiswa ("test3","05111740000003","Informatika","Blok U","Islam");  
     Mahasiswa a4 = new Mahasiswa ("test4","05111740000004","Informatika","Kejawan Gebang","Islam");  
     Mahasiswa a5 = new Mahasiswa ("test5","05111740000005","Informatika","Keputih","Islam");  
     Dosen b1 = new Dosen ("Pak Fajar","D0001","Pemrograman Berbasis Objek","Surabaya","Islam");  
     Dosen b2 = new Dosen ("Pak Arun","D0002","Struktur Data","Surabaya","Kristen");  
     Dosen b3 = new Dosen ("Bu Sarwo","D0003","Sistem Basis Data","Surabaya","Islam");  
     Dosen b4 = new Dosen ("Pak Bagus","D0004","Jaringan Komputer","Surabaya","Islam");  
     Dosen b5 = new Dosen ("Pak Hadziq","D0005","Teori Graf dan Otomata","Surabaya","Islam");  
     Kelas c1 = new Kelas ("A","K0001",35);  
     Kelas c2 = new Kelas ("B","K0002",35);  
     Kelas c3 = new Kelas ("C","K0003",35);  
     Kelas c4 = new Kelas ("D","K0004",35);  
     Kelas c5 = new Kelas ("E","K0005",35);  
     Matkul d1 = new Matkul ("Pemrograman Berbasis Objek","M0001","Tiga");  
     Matkul d2 = new Matkul ("Stuktur Data","M0002","Tiga");  
     Matkul d3 = new Matkul ("Sistem Basis Data","M0003","Tiga");  
     Matkul d4 = new Matkul ("Jaringan Komputer","M0004","Tiga");  
     Matkul d5 = new Matkul ("Teori Graf dan Otomata","M0005","Tiga");  
     Pegawai e1 = new Pegawai ("Siti","P0001","Surabaya","Islam");  
     Pegawai e2 = new Pegawai ("Budi","P0002","Surabaya","Islam");  
     Pegawai e3 = new Pegawai ("Dira","P0003","Surabaya","Islam");  
     Pegawai e4 = new Pegawai ("Bina","P0004","Surabaya","Islam");  
     Pegawai e5 = new Pegawai ("Lala","P0005","Surabaya","Islam");  
     Buku f1 = new Buku ("Data Structures in C","B0001","Noel Kalicharan",1990);  
     Buku f2 = new Buku ("Graph Theory With Applications","B0002","C.Vasudev",2006);  
     Buku f3 = new Buku ("Computer Networking","B0003","Kurose & Ross",2003);  
     Buku f4 = new Buku ("Object First With Java","B0004","David Barnes",2003);  
     Buku f5 = new Buku ("Numerical Methods for Engineers","B0005","Steven & Raymond",1998);  
     System.out.println("===============DATABASE AKADEMIK INFORMARIKA ITS===============");  
     System.out.println("\n");  
     System.out.println("########DATABASE MAHASISWA########");  
     System.out.println(a1);  
     System.out.println("\n");  
     System.out.println("########DATABASE DOSEN########");  
     System.out.println(b1);  
     System.out.println("\n");  
     System.out.println("########DATABASE KELAS########");  
     System.out.println(c1);  
     System.out.println("\n");  
     System.out.println("########DATABASE MATA KULIAH########");  
     System.out.println(d1);  
     System.out.println("\n");  
     System.out.println("########DATABASE PEGAWAI########");  
     System.out.println(e1);  
     System.out.println("\n");  
     System.out.println("########DATABASE BUKU########");  
     System.out.println(f1);  
     System.out.println("\n");  
   }  
 }

9. Jalankan Program