Time1 Class Declaration

public class Time1
5 {
6 private int hour; // 0 - 23
7 private int minute; // 0 - 59
8 private int second; // 0 - 59
9
10 // set a new time value using universal time; ensure that
11 // the data remains consistent by setting invalid values to zero
12 public void setTime( int h, int m, int s )
13
14 hour = ( ( h >= 0 && h < 24 ) ? h : 0 ); // validate hour 15 minute = ( ( m >= 0 && m < 60 ) ? m : 0 ); // validate minute 16 second = ( ( s >= 0 && s < 60 ) ? s : 0 ); // validate second
17 } // end method setTime
18
19 // convert to String in universal-time format (HH:MM:SS)
20 public String toUniversalString()
21 {
22 return String.format( "%02d:%02d:%02d", hour, minute, second );
23 } // end method toUniversalString
24
25 // convert to String in standard-time format (H:MM:SS AM or PM)
26 public String toString()
27 {
28 return String.format( "%d:%02d:%02d %s",
29 ( ( hour == 0 || hour == 12 ) ? 12 : hour % 12 ),
30 minute, second, ( hour < 12 ? "AM" : "PM" ) );
31 } // end method toString
32 } // end class Time1





Figure 8.2. Time1 object used in an application.
(This item is displayed on page 362 in the print version)
1 // Fig. 8.2: Time1Test.java
2 // Time1 object used in an application.
3
4 public class Time1Test
5 {
6 public static void main( String args[] )
7 {
8 // create and initialize a Time1 object
9 Time1 time = new Time1(); // invokes Time1 constructor
10
11 // output string representations of the time
12 System.out.print( "The initial universal time is: " );
13 System.out.println( time.toUniversalString() );
14 System.out.print( "The initial standard time is: " );
15 System.out.println( time.toString() );
16 System.out.println(); // output a blank line
17
18 // change time and output updated time
19 time.setTime( 13, 27, 6 );
20 System.out.print( "Universal time after setTime is: " );
21 System.out.println( time.toUniversalString() );
22 System.out.print( "Standard time after setTime is: " );
23 System.out.println( time.toString() );
24 System.out.println(); // output a blank line
25
26 // set time with invalid values; output updated time
27 time.setTime( 99, 99, 99 );
28 System.out.println( "After attempting invalid settings:" );
29 System.out.print( "Universal time: " );
30 System.out.println( time.toUniversalString() );
31 System.out.print( "Standard time: " );
32 System.out.println( time.toString() );
33 } // end main
34 } // end class Time1Test