Latihan Membuat Jam

Latihan Membuat Jam

Tugas PBO A

Kali ini saya akan membahas tentang bagaimana membuat jam menggunakan aplikasi BlueJ. Pertama anda tentunya harus memiliki source codenya, berikut :

1. Source Code NumberDisplay

 /**  
  * Write a description of class NumberDisplay here.  
  *  
  * @author (Yuki Yanuar Ratna)  
  * @version (26-09-2018)  
  */  
 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. Source Code ClockDisplay

 /**  
  * Write a description of class ClockDisplay here.  
  *  
  * @author (Yuki Yanuar Ratna)  
  * @version (26-09-2018)  
  */  
 public class ClockDisplay  
 {  
   private NumberDisplay hours;  
   private NumberDisplay minutes;  
   private String displayString;  
   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)  
     {  
       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. Source Code TestClockDisplay

 /**  
  * Write a description of class TestClockDisplay here.  
  *  
  * @author (Yuki Yanuar Ratna)  
  * @version (26-09-2018)  
  */  
 public class TestClockDisplay  
 {  
   /**  
    * Constructor for objects of class TestClockDisplay  
    */  
   public TestClockDisplay()  
   {  
   }  
   public void test()  
   {  
     ClockDisplay Clock = new ClockDisplay();  
     Clock.setTime(1,0);  
     System.out.println(Clock.getTime());  
     Clock.setTime(07,30);  
     System.out.println(Clock.getTime());  
     Clock.setTime(12,30);  
     System.out.println(Clock.getTime());  
     Clock.setTime(18,0);  
     System.out.println(Clock.getTime());  
   }  
 }  

3. Dan berikut adalah langkah-langkah untuk mengetahui hasil akhir

Sekian, semoga bermanfaat