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  1. import java.util.ArrayList;
  2. public class Database
  3. {
  4. private ArrayList<Mahasiswa> mahasiswa;
  5. private ArrayList<Dosen> dosen;
  6. private ArrayList<Pegawai> pegawai;
  7. public Database()
  8. {
  9. mahasiswa = new ArrayList<Mahasiswa>();
  10. dosen = new ArrayList<Dosen>();
  11. pegawai = new ArrayList<Pegawai>();
  12. }
  13. public void addMahasiswa(Mahasiswa Themhs)
  14. {
  15. mahasiswa.add(Themhs);
  16. }
  17. public void addDosen(Dosen dsn)
  18. {
  19. dosen.add(dsn);
  20. }
  21. public void addPegawai(Pegawai pgw)
  22. {
  23. pegawai.add(pgw);
  24. }
  25. public void listMahasiswa()
  26. {
  27. for(Mahasiswa mhs : mahasiswa)
  28. {
  29. mhs.print();
  30. System.out.println();
  31. }
  32. }
  33. public void listDosen()
  34. {
  35. for(Dosen dsn : dosen)
  36. {
  37. dsn.prnt();
  38. System.out.println();
  39. }
  40. }
  41. public void listPegawai()
  42. {
  43. for(Pegawai pgw : pegawai)
  44. {
  45. pgw.prnt();
  46. System.out.println();
  47. }
  48. }
  49. public void delMahasiswa(Mahasiswa Themhs)
  50. {
  51. mahasiswa.remove(Themhs);
  52. }
  53. public void delPegawai(Pegawai pgw)
  54. {
  55. pegawai.remove(pgw);
  56. }
  57. public void delMahasiswa(Dosen dsn)
  58. {
  59. dosen.remove(dsn);
  60. }
  61. }
');