Laporan Modul 2 PBO

Implementasi
Membuat tiga object class dengan nama Student, subclass
StudentGrad dan class StudentInfo.

JAWABAN:
  disimpan dalam file Student.java

  class Student { public void Write(int ID, int Grad, String Fname, String Lname) { m_ID = ID; m_Graduation = Grad; m_First = Fname; m_Last = Lname; } public void Display(){ System.out.println( "Student: " + m_ID + " " + m_First + " " + m_Last + " Graduated: " + m_Graduation); } private int m_ID, m_Graduation; private String m_First; private String m_Last; } class StudentGrad extends Student { public void Write(int ID, int Grad, String Fname, String Lname, int yrGrad, String unSch, String major) { super.Write(ID, Grad, Fname, Lname); m_UndergradSchool = unSch; m_Major = major; m_Grad = Grad; YearGraduated = yrGrad; } public void Display(){ super.Display(); System.out.println(" Graduated: " + m_Grad + " " + m_UndergradSchool + " " + m_Major + " " + YearGraduated); } private Integer YearGraduated,m_Grad; private String m_UndergradSchool; private String m_Major; } class StudentInfo { public static void main (String args[]) { StudentGrad myStudent = new StudentGrad(); myStudent.Write(10,1,"Bob","Smith",2000,"Columbia University","CS"); myStudent.Display(); } }
Hasil Running:

Tugas Akhir
Kucing, Ayam, dan Anjing merupakan makhluk hidup yang masuk kategori hewan, tiap hewan pasti mempunyai identitas baik itu berupa tipe hewan dan  suaranya.
source code untuk membuat program tampil nama hewan dan suaranya adalah:
>Disimpan dalam file hewan.java
class hewan { private String tipe; public hewan(String tipe){ this.tipe = tipe; } public String toString(){ return “Ini adalah “+tipe; } public void bersuara(){ } }
>Disimpan dalam file Anjing.java
class Anjing extends hewan{ private String nama; private String jenis; public Anjing(String nama, String jenis){ super(“Anjing”); this.nama=nama; this.jenis=jenis; } public void bersuara(){ System.out.println(“Guk.. Guk.. Guk.. “); } public String toString(){ return super.toString()+”\nIni adalah “+jenis+” bernama “+nama; } }
>Disimpan dalam file Ayam.java
class Ayam extends hewan{ private String nama; private String jenis; public Ayam(String nama, String jenis){ super(“Ayam”); this.nama=nama; this.jenis=jenis; } public void bersuara(){ System.out.println(“Kukuruyuk.. Petok.. Petok..”); } public String toString(){ return super.toString()+”\nIni adalah “+jenis+” bernama “+nama; } }
>Disimpan dalam file Kucing.java
class Kucing extends hewan{ private String nama; private String jenis; public Kucing(String nama){ super(“Kucing”); this.nama=nama; } public Kucing(String nama, String jenis){ super(“Kucing”); this.nama=nama; this.jenis=jenis; } public void bersuara(){ System.out.println(“Meong.. Meong.. Meong.. “); } public String toString(){ return super.toString()+”\nIni adalah “+jenis+” bernama “+nama; } }
>Disimpan dalam file polimorfisme.java
import java.util.Random; class polimorfisme{ public static void main(String args[]){ hewan[] hewannya = { new Anjing(“Broni”, “Herder”), new Kucing(“Kiti”, “Persia”), new Ayam(“Toki”, “Buras”) }; hewan pilihHewan; Random pilih = new Random(); for (int i = 0; i<5 ; i++){ pilihHewan = hewannya[pilih.nextInt(hewannya.length)]; System.out.println(“\nPilihan Anda:\n” + pilihHewan); pilihHewan.bersuara(); } } }  
Hasil Running: