Question

Java Programming

The program template represents a complete working Java program with one or more key lines of code replaced with comments. Read the problem description and examine the output, then study the template code. Using the problem-solving tips as a guide, replace the /* */ comments with Java code. Compile and execute the program. Compare your output with the sample output provided. Modify class Time2 to include a tick method that increments the time stored in a Time2 object by one second. Provide method incrementMinute to increment the minute and method incrementHour to increment the hour. The Time2 object should always remain in a consistent state. 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 and

c) incrementing into the next day (i.e., 11:59:59 PM to 12:00:00 AM).

5 public class Time2 { private int hour; // 0- 23 private int minute; // 0-59 private int second; //0-59 6 7 8 / Time2 no-argument constructor: initializes each instance variable / to zero; ensures that Time2 objects start in a consistent state public Time2O 12 13 14 15 this 0, 0, 0 ); // invoke Time2 constructor with three arguments // end Time2 no-argument constructor 16 17 //Time2 constructor: hour supplied, minute and second defaulted to O public Time2C int h ) { this h, 0,0 ; // invoke Time2 constructor with three arguments // end Time2 one-argument constructor 18 19 20 21 22 23 24 / Time2 constructor: hour and minute supplied, second defaulted to 0 public Time2( int h, int m { this h, m, 0 ); // invoke Time2 constructor with three arguments // end Time2 two-argument constructor 25 26 27 28 29 / Time2 constructor: hour, minute and second supplied public Time2 int h, int m, int s) { setTimeh,m, s ); // invoke setTime to validate time // end Time2 three-argument constructor 30 31 32 33 34 35 //Time2 constructor: another Time2 object supplied public Time2 Time2 time ) { / invoke Time2 constructor with three arguments this( time.getHour (), time.getMinute (), time.getSecond () ); // end Time2 constructor with Time2 argument 36 37 38 39 40 41 42 43 44 45 46 /Set Methods / set a new ti me value using universal time; perform validity checks on data; set invalid values to zero public void setTime ( int h, int m, int s ) { setHour h);// set the hour setMinute( m; // set the mi nute setSeconds; // set the second } // end method setTime 47 48 49 50 51 52

Answer 1

Below is the solution:

For tick second, increment second, increment minute

// Tick the time by one second
   public void tick()
   {
      setSecond( second + 1 ); // increment/tick second

      if ( second == 0 )
         incrementMinute();
   } // end method tick

   // Increment the minute
   public void incrementMinute()
   {
      setMinute( minute + 1 ); //increment minute

      if ( minute == 0 )
         incrementHour();
   } // end method incrementMinute

   // Increment the hour
   public void incrementHour()
   {
      setHour( hour + 1 ); //increment hour
   } // end method incrementHour