Tugas #PBOA-tugas 5 (Jam)

Interaksi Objek

Membuat Jam

Untuk membuat jam diperlukan tiga class, yaitu :

1. NumberDisplay
2. ClockDisplay
3. TestClockDisplay

Berikut adalah souce code yang digunakan :

1. NumberDisplay



 /*  
 /*   
  * @author Nitama Nurlingga Yotifa  
  * @version 20180939  
 */  
 public class NumberDisplay  
 {  
   private int limit;  
   private int value;  
   public NumberDisplay(int rollOverLimit)  
   {  
     limit = rollOverLimit;  
     value = 0;  
   }  
   public int getValue()  
   {  
     return value;  
   }  
   public void setValue(int replacementValue)  
   {  
     if((replacementValue >= 0) &&  
     (replacementValue < limit)) {  
       value = replacementValue;  
     }  
   }  
   public String getDisplayValue()  
   {  
     if(value < 10) {  
       return "0" + value;  
     }  
     else {  
       return "" + value;  
     }  
   }  
   public void increment()  
   {  
     value = (value + 1) % limit;  
   }  
 }  



2. ClockDisplay



 /*  
 /*   
  * @author Nitama Nurlingga Yotifa  
  * @version 20180939  
 */  
 public class ClockDisplay  
 {  
   private NumberDisplay hours;  
   private NumberDisplay minutes;  
   private String displayString; // simulates the actual display  
   public ClockDisplay()  
   {  
     hours = new NumberDisplay(24);  
     minutes = new NumberDisplay(60);  
     updateDisplay();  
   }  
   public ClockDisplay(int hour, int minute)  
   {  
     hours = new NumberDisplay(24);  
     minutes = new NumberDisplay(60);  
     setTime(hour, minute);  
   }  
   public void timeTick()  
   {  
     minutes.increment();  
     if(minutes.getValue() == 0) { // it just rolled over!  
       hours.increment();  
     }  
     updateDisplay();  
   }  
   public void setTime(int hour, int minute)  
   {  
     hours.setValue(hour);  
     minutes.setValue(minute);  
     updateDisplay();  
   }  
   public String getTime()  
   {  
     return displayString;  
   }  
   private void updateDisplay()  
   {  
     int hour = hours.getValue();  
     String suffix;  
     if(hour >= 12){  
       suffix = "pm";  
     }  
     else{  
       suffix = "am";  
     }  
     if(hour >= 12){  
       hour-=12;  
     }  
     if(hour == 0){  
       hour = 12;  
     }  
     displayString = hour + "." +  
             minutes.getDisplayValue() + suffix;  
   }  
 }  



3. TestClockDisplay



 /**  
  * @author (Nitama Nurlingga Yotifa)  
  * @version (20180930)  
  */  
 public class TestClockDisplay  
 {  
   public TestClockDisplay()  
   {  
   }  
   public void test()  
   {  
     ClockDisplay clock = new ClockDisplay();  
     clock.setTime(22, 30);  
     System.out.println(clock.getTime());  
     clock.setTime(10, 30);  
     System.out.println(clock.getTime());  
     clock.setTime(00, 00);  
     System.out.println(clock.getTime());  
     clock.setTime(18, 00);  
     System.out.println(clock.getTime());  
   }  
 }  

Hasil dari program di atas:

Untuk membuat GUI clock display diperlukan dua class, yaitu :

1. clock
2. Executor

Berikut adalah souce code yang digunakan :

1. clock



 /*  
  *  
  * @author (Nitama Nurlingga Yotifa)  
  * @version (20180930)  
  */  
 import javax.swing.*;  
 import java.awt.*;  
 import java.awt.event.*;  
 import java.util.Calendar;  
 public class clock extends JFrame  
 {  
   private static final long serialVersionUID = 1L;  
   JTextField timeF;  
   JPanel panel;  
   public clock()  
   {  
     super("Java Clock by Nitama Nurlingga Yotifa");  
     setSize(225, 200);  
     setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
     setVisible(true);  
     setResizable(true);  
     setLocationRelativeTo(null);  
     panel = new JPanel();  
     panel.setLayout(new FlowLayout());  
     timeF = new JTextField(10);  
     timeF.setEditable(false);  
     timeF.setFont(new Font("Arial",Font.PLAIN,48));  
     panel.add(timeF);  
     add(panel);  
     Timer t = new Timer(1000,new Listener());  
     t.start();  
   }  
   class Listener implements ActionListener  
   {  
     public void actionPerformed(ActionEvent e)  
     {  
       Calendar rightNow = Calendar.getInstance();  
       int hour = rightNow.get(Calendar.HOUR_OF_DAY);  
       int min = rightNow.get(Calendar.MINUTE);  
       int sec = rightNow.get(Calendar.SECOND);  
       timeF.setText(hour+":"+min+":"+sec);  
     }  
   }  
 }  



2. Executor



 /**  
  * Write a description of class Executor here.  
  *  
  * @author (Nitama Nurlingga Yotifa)  
  * @version (20180930)  
  */  
 public class Executor  
 {  
   public static void main (String[]args)  
   {  
     new Executor();  
   }  
   public Executor()  
   {  
     new clock();  
   }  
 }  

Berikut adalah hasil dari program diatas :