Modify class Time2 of fig 8.5, (which is split into four pictures) to include a tick method that increments the time stored in a Time2 object by one second. Provide method incrementMinute to increment the minute by one and method incrementHour to increment the hour by one. Write a program that tests the tick method, the incrementMinute method and the incrementHour method to ensure that they work correctly. Be sure to test the following cases:

a: incrementing into the next minute
b:incrementing into the next hour
c:incrementing into the next day(ie. 11:59:59 PM to 12:00:00AM

Explanation:

Complete Program:

NOTE:   The newly added statements are highlighted in bold.

// File: Time2.java

public class Time2

{

private int hour; // 0 - 23

private int minute; // 0 - 59

private int second; // 0 - 59

public Time2()

{

 this(0, 0, 0);

}

public Time2(int hour)

{

 this(hour, 0, 0);

}

public Time2(int hour, int minute)

{

 this(hour, minute, 0);

}

public Time2(int hour, int minute, int second)

{

 if(hour < 0 || hour >= 24)

  throw new IllegalArgumentException("hour must be 0-23");

 if(minute < 0 || minute >= 60)

  throw new IllegalArgumentException("minute must be 0-59");

 if(second < 0 || second >= 60)

  throw new IllegalArgumentException("second must be 0-59");

 this.hour = hour;

 this.minute = minute;

 this.second = second;

}

public Time2(Time2 time)

{

 this(time.getHour(), time.getMinute(), time.getSecond());

}

public void setTime(int hour, int minute, int second)

{

 if(hour < 0 || hour >= 24)

  throw new IllegalArgumentException("hour must be 0-23");

 if(minute < 0 || minute >= 60)

  throw new IllegalArgumentException("minute must be 0-59");

 if(second < 0 || second >= 60)

  throw new IllegalArgumentException("second must be 0-59");

 this.hour = hour;

 this.minute = minute;

 this.second = second;

}

public void setHour(int hour)

{

 if(hour < 0 || hour >= 24)

  throw new IllegalArgumentException("hour must be 0-23");

 this.hour = hour;

}

public void setMinute(int minute)

{

 if(minute < 0 || minute >= 60)

  throw new IllegalArgumentException("minute must be 0-59");

 this.minute = minute;

}

public void setSecond(int second)

{

 if(second < 0 || second >= 60)

  throw new IllegalArgumentException("second must be 0-59");

 this.second = second;

}

public int getHour()

{

 return hour;

}

public int getMinute()

{

 return minute;

}

public int getSecond()

{

 return second;

}

public String toUniversalString()

{

 return String.format("%02d:%02d:%02d", getHour(), getMinute(),

   getSecond());

}

public String toString()

{

 return String.format("%d:%02d:%02d %s",

   ((getHour() == 0 || getHour() == 12) ? 12 : getHour() % 12),

   getMinute(), getSecond(), (getHour() < 12 ? "AM" : "PM"));

}

// increment second

public void tick()

{

 if(second < 23)

 {

  second++;

 }

 else if(minute < 59)

 {

  second = 0;

  minute++;

 }

 else if(hour < 23)

 {

  second = 0;

  minute = 0;

  hour++;

 }

 else

 {

  second = 0;

  minute = 0;

  hour = 0;

 }    

}

// increment minute

public void incrementMinute()

{

 if(minute < 59)

 {

  minute++;

 }

 else if(hour < 23)

 {

  minute = 0;

  hour++;

 }

 else

 {

  minute = 0;

  hour = 0;

 }    

}

public void incrementHour()

{

 if(hour < 23)

 {

  hour++;

 }

 else

 {

  hour = 0;

 }    

}

}

// File: Time2Test.java

public class Time2Test

{

  public static void main( String args[] )

  {      

     Time2 t = new Time2(22, 58, 59);

     System.out.println("Starting time: ");

     System.out.println("Time in 24 hours format: " + t.toUniversalString());

     System.out.println("Time in 12 hours format: " + t);

     System.out.println();

     t.incrementMinute();

     System.out.println("After incrementing one minute: ");

     System.out.println("Time in 24 hours format: " + t.toUniversalString());

     System.out.println("Time in 12 hours format: " + t);

     System.out.println();

     t.incrementHour();

     System.out.println("After incrementing one hour: ");

     System.out.println("Time in 24 hours format: " + t.toUniversalString());

     System.out.println("Time in 12 hours format: " + t);

     System.out.println();

     t.tick();

     System.out.println("After incrementing one second: ");

     System.out.println("Time in 24 hours format: " + t.toUniversalString());

     System.out.println("Time in 12 hours format: " + t);    

     System.out.println();

  }

}

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