Tugas 9 PBO C Error Handling

Nama : Dewangga Dharmawan

NRP : 05111940000029

Kelas : PBO C

Dosen : Fajar Baskoro

Program yang akan dicoba errornya adalah Address Book oleh David J. Barnes dan Michael Kolling, sebagian diambil dari buku Object FIrst Java. Sebagian ditemukan di Gitlab via Google

Diagram Kelas Address Book

Class AddressBookDemo

 /**  
  * Class ini mengisikan sampel data input program AddressBook  
  * (Sebagian program dibuat oleh David J. Barnes dan Michael Kolling)  
  * (Sisanya memiliki sedikit kombinasi)  
  *  
  * @author (Dewangga Dharmawan)  
  * @version (21/12/2020)  
  */  
 public class AddressBookDemo  
 {  
   private AddressBook book;  
   private AddressBookGUI interact;  
   //Sample data (Ketiganya merupakan string)  
   public AddressBookDemo()  
   {  
     ContactDetails[] sampleDetails = {  
       new ContactDetails("nova", "555-1220", "Almagano Street, Torn City")  
     };  
     book = new AddressBook();  
     for(ContactDetails details : sampleDetails)  
     book.addDetails(details);  
     //GUI address book  
     interact = new AddressBookGUI(book);  
   }  
   //Metode menampilkan address book  
   public void showInterface()  
   {  
     interact.setVisible(true);  
   }  
   //Mengembalikan sample address book  
   public AddressBook getBook()  
   {  
     return book;  
   }  
 }  

Class AddressBookGUI

 /**  
  * Class ini untuk memberikan GUI untuk program  
  *  
  * @author (Dewangga Dharmawan)  
  * @version (21/12/2020)  
  */  
 import java.awt.*;  
 import java.awt.event.*;  
 import javax.swing.*;  
 import javax.swing.event.*;  
 import java.util.*;  
 public class AddressBookGUI extends JFrame  
 {  
   //Deklarasi ukuran frame dan alamat yang akan ditampilkan dan diubah  
   private static final int PREFERRED_WIDTH = 500,  
   PREFERRED_HEIGHT = 500;  
   private static final Dimension PREFERRED_SIZE = new Dimension(PREFERRED_WIDTH, PREFERRED_HEIGHT);  
   private AddressBook book;  
   //Metode membuat panel  
   public AddressBookGUI(AddressBook book)  
   {  
     this.book = book;  
     setTitle("Buku Ungu");  
     addWindowListener(new WindowAdapter() {  
       public void windowClosing(WindowEvent ev)  
       {  
         setVisible(false);  
       }  
     });  
     final Container contentPane = getContentPane();  
     JTabbedPane tabbedArea = new JTabbedPane();  
     tabbedArea.add("Cari", setupSearchArea());  
     tabbedArea.add("Tambah", setupDataEntry());  
     tabbedArea.add("Tampil", setupListArea());  
     contentPane.add(tabbedArea);  
     setSize(PREFERRED_SIZE);  
   }  
   //Menampilkan layar jika ditutup  
   public void showWindow()  
   {  
     setVisible(true);  
   }  
   //Mengembalikan ukuran layar  
   public Dimension getPreferredSize()  
   {  
     return PREFERRED_SIZE;  
   }  
   //Menampilkan layar memasukan data  
   //Sekaligus antara menghapus atau menambah data  
   private Container setupDataEntry()  
   {  
     Box nameLabelArea = Box.createHorizontalBox();  
     nameLabelArea.add(new JLabel("Nama", JLabel.LEFT));  
     nameLabelArea.add(Box.createGlue());  
     final JTextField nameField = new JTextField(50);  
     Box nameArea = Box.createVerticalBox();  
     nameArea.add(nameLabelArea);  
     nameArea.add(nameField);  
     Box phoneLabelArea = Box.createHorizontalBox();  
     phoneLabelArea.add(new JLabel("Telepon", JLabel.LEFT));  
     phoneLabelArea.add(Box.createGlue());  
     final JTextField phoneField = new JTextField(50);  
     Box phoneArea = Box.createVerticalBox();  
     phoneArea.add(phoneLabelArea);  
     phoneArea.add(phoneField);  
     Box addressLabelArea = Box.createHorizontalBox();  
     addressLabelArea.add(new JLabel("Alamat", JLabel.LEFT));  
     addressLabelArea.add(Box.createGlue());  
     Box addressArea = Box.createVerticalBox();  
     final JTextArea address = new JTextArea(10, 50);  
     addressArea.add(addressLabelArea);  
     addressArea.add(address);  
     Box singleLineFields = Box.createVerticalBox();  
     singleLineFields.add(nameArea);  
     singleLineFields.add(phoneArea);  
     JPanel detailsPanel = new JPanel();  
     detailsPanel.setLayout(new BorderLayout());  
     detailsPanel.add(singleLineFields, BorderLayout.NORTH);  
     detailsPanel.add(addressArea, BorderLayout.CENTER);  
     JPanel buttonArea = new JPanel();  
     JButton add = new JButton("Tambah");  
     JButton clear = new JButton("Hapus");  
     add.addActionListener(e -> {  
       book.addDetails(  
       new ContactDetails(nameField.getText(),phoneField.getText(),  
       address.getText()));  
     });  
     clear.addActionListener(e -> {  
       nameField.setText("");  
       phoneField.setText("");  
       address.setText("");  
     });  
     buttonArea.add(add);  
     buttonArea.add(clear);  
     JPanel panel = new JPanel();  
     panel.setLayout(new BorderLayout());  
     panel.add(detailsPanel, BorderLayout.CENTER);  
     panel.add(buttonArea, BorderLayout.SOUTH);  
     return panel;  
   }  
   //Menampilkan layar mencari entri  
   private Container setupSearchArea()  
   {  
     //Bagian memasukan yang akan dicari  
     Box searchLabelArea = Box.createHorizontalBox();  
     searchLabelArea.add(new JLabel("Cari", JLabel.LEFT));  
     searchLabelArea.add(Box.createGlue());  
     final JTextField searchField = new JTextField(50);  
     Box searchArea = Box.createHorizontalBox();  
     searchArea.add(searchLabelArea);  
     searchArea.add(searchField);  
     //Menampilkan pencarian yang sesuai  
     final JTextArea resultList = new JTextArea(10, 50);  
     resultList.setEditable(false);  
     JScrollPane scrollArea =  
     new JScrollPane(resultList, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,  
     JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);  
     //Jika ada perubahan, maka akan dilakukan pencarian ulang  
     searchField.getDocument().addDocumentListener(new DocumentListener(){  
       public void changedUpdate(DocumentEvent ev)  
       {  
         research();  
       }  
       public void insertUpdate(DocumentEvent ev)  
       {  
         research();  
       }  
       public void removeUpdate(DocumentEvent ev)  
       {  
         research();  
       }  
       //Jika yang dicari kosong, maka datanya akan dihapus  
       private void research()  
       {  
         String searchString = searchField.getText();  
         StringBuilder buffer = new StringBuilder();  
         if(searchString.length() > 0)  
         {  
           ContactDetails[] results = book.search(searchString);  
           for(int i = 0; i < results.length; i++)  
           buffer.append(results[i].toString()).append("\n\n");  
         }  
         resultList.setText(buffer.toString());  
       }  
     });  
     JPanel listArea = new JPanel();  
     listArea.setLayout(new BorderLayout());  
     listArea.add(searchArea, BorderLayout.NORTH);  
     listArea.add(scrollArea, BorderLayout.CENTER);  
     return listArea;  
   }  
   //Menampilkan layar daftar nama, alamat, dan nomor telepon  
   private Container setupListArea()  
   {  
     final JTextArea details = new JTextArea(10, 50);  
     details.setEditable(false);  
     JScrollPane scrollArea =   
     new JScrollPane(details, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,  
     JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);  
     JPanel buttonArea = new JPanel();  
     JButton list = new JButton("Daftar"), clear = new JButton("Bersihkan");  
     list.addActionListener(e -> details.setText(book.listDetails()));  
     clear.addActionListener(e -> details.setText(""));  
     buttonArea.add(list);  
     buttonArea.add(clear);  
     JPanel panel = new JPanel();  
     panel.setLayout(new BorderLayout());  
     panel.add(scrollArea, BorderLayout.CENTER);  
     panel.add(buttonArea, BorderLayout.SOUTH);  
     return panel;  
   }  
 }  

Class ContactDetails

 /**  
  * Class ini menampilkan nama, alamat, dan nomor telepon  
  *  
  * @author (Dewangga Dharmawan)  
  * @version (21/12/2020)  
  */  
 public class ContactDetails implements Comparable<ContactDetails>  
 {  
   private String name, phone, address;  
   //Metode menyiapkan susunan nama, alamat, dan nomor telepon  
   //Jika ada white space (spasi), dihapuskan  
   public ContactDetails(String name, String phone, String address)  
   {  
     //Jika null, menggunakan string kosong  
     if(name == null)  
     name = "";  
     if(phone == null)  
     phone = "";  
     if(address == null)  
     address = "";  
     this.name = name.trim();  
     this.phone = phone.trim();  
     this.address = address.trim();  
     //Mengecek apabila nama, nomor telepon, dan alamat ada  
     if(this.name.length() == 0 || this.phone.length() == 0 || this.address.length() == 0)  
     {  
       throw new IllegalStateException("Ada yang masih kosong");  
     }  
   }  
   //Mengembalikan nama  
   public String getName()  
   {  
     return name;  
   }  
   //Mengembalikan alamat  
   public String getAddress()  
   {  
     return address;  
   }  
   //Mengembalikan nomor telepon  
   public String getPhone()  
   {  
     return phone;  
   }  
   //Metode mengecek persamaan antara dua objek  
   public boolean equals(Object other)  
   {  
     if(other instanceof ContactDetails)  
     {  
       ContactDetails otherDetails = (ContactDetails) other;  
       return name.equals(otherDetails.getName()) &&  
       phone.equals(otherDetails.getPhone()) &&  
       address.equals(otherDetails.getAddress());  
     }  
     else  
     return false;  
   }  
   //Membandingkan detil objek untuk mengurutkan daftar  
   public int compareTo(ContactDetails otherDetails)  
   {  
     int comparison = name.compareTo(otherDetails.getName());  
     if(comparison != 0)  
     return comparison;  
     comparison = phone.compareTo(otherDetails.getPhone());  
     if(comparison != 0)  
     return comparison;  
     return address.compareTo(otherDetails.getAddress());  
   }  
   //Mengembalikan tampilan nama, nomor telepon, dan alamat  
   public String toString()  
   {  
     return name + "\n" + phone + "\n" + address;  
   }  
   //Membuat kode hashcode untuk menyimpan kontak  
   public int hashCode()  
   {  
     int code = 17;  
     code = 37 * code + name.hashCode();  
     code = 37 * code + phone.hashCode();  
     code = 37 * code + address.hashCode();  
     return code;  
   }  
 }  

Class AddressBook

 /**  
  * Class untuk menyimpan beberapa kontak berdasarkan nama dan nomor telepon  
  *  
  * @author (Dewangga Dharmawan)  
  * @version (21/12/2020)  
  */  
 import java.util.*;  
 public class AddressBook  
 {  
   //Deklarasi penyimpanan kontak dan banyaknya  
   private TreeMap<String, ContactDetails> book;  
   private int numberOfEntries;  
   //Inisialisasi buku kontak  
   public AddressBook()  
   {  
     book = new TreeMap<>();  
     numberOfEntries = 0;  
   }  
   //Memberikan objek kontak  
   public ContactDetails getDetails(String key)  
   {  
     //Mengecek apabila keynya kosong atau tidak  
     if(key == null)  
     {  
       throw new IllegalArgumentException(  
       "ada nilai null dalam getDetails");  
     }  
     if(key.trim().length() == 0)  
     {  
       throw new IllegalArgumentException(  
       "Nilai kosong masuk dalam getDetails");  
     }  
     return book.get(key);  
   }  
   //Memberikan key, yang mana digunakan atau tidak  
   public boolean keyInUse(String key)  
   {  
     return book.containsKey(key);  
   }  
   //Menambahkan detil buku kontak  
   public void addDetails(ContactDetails details)  
   {  
     if(details != null)  
     {  
       book.put(details.getName(), details);  
       book.put(details.getPhone(), details);  
       numberOfEntries++;  
     }  
   }  
   //Mengubah detail kontak tertentu  
   public void changeDetails(String oldKey, ContactDetails details)  
   {  
     if(keyInUse(oldKey) && details != null)  
     {  
       removeDetails(oldKey);  
       addDetails(details);  
     }  
   }  
   //Menampilkan kontak dengan search tertentu  
   public ContactDetails[] search(String keyPrefix)  
   {  
     List<ContactDetails> matches = new LinkedList<>();  
     if(keyPrefix != null)  
     {  
       SortedMap<String, ContactDetails> tail = book.tailMap(keyPrefix);  
       Iterator<String> it = tail.keySet().iterator();  
       boolean endOfSearch = false;  
       while(!endOfSearch && it.hasNext())  
       {  
         String key = it.next();  
         if(key.startsWith(keyPrefix))  
         matches.add(book.get(key));  
         else  
         endOfSearch = true;  
       }  
     }  
     ContactDetails[] results = new ContactDetails[matches.size()];  
     matches.toArray(results);  
     return results;  
   }  
   //Memberikan banyak kontak dalam buku  
   public int getNumberOfEntries()  
   {  
     return numberOfEntries;  
   }  
   //Menghapus kontak  
   public void removeDetails(String key)  
   {  
     //Mengecek apabila ada key yang tidak valid  
     if(keyInUse(key))  
     {  
       ContactDetails details = book.get(key);  
       book.remove(details.getName());  
       book.remove(details.getPhone());  
       numberOfEntries--;  
     }  
   }  
   //Menampilkan semua kontak secara daftar  
   public String listDetails()  
   {  
     StringBuilder allEntries = new StringBuilder();  
     Set<ContactDetails> sortedDetails = new TreeSet<>(book.values());  
     for(ContactDetails details : sortedDetails)  
     allEntries.append(details).append("\n\n");  
     return allEntries.toString();  
   }  
 }  

Implementasi

Menjalankan program dengan menggunakan Class AddressBookDemo lalu menekan showInterface()

Memasukan input kosong (Pada salah satu input), dan menampilkan status errornya