1 | // Fig. 8.5: Time2.java |
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2 | // Time2 class declaration with overloaded constructors. |
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3 | |
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4 | public class Time2 |
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5 | { |
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6 | private int hour; // 0 - 23 |
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7 | private int minute; // 0 - 59 |
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8 | private int second; // 0 - 59 |
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9 | |
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10 | // Time2 no-argument constructor: initializes each instance variable |
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11 | // to zero; ensures that Time2 objects start in a consistent state |
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12 | public Time2() |
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13 | { |
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14 | this( 0, 0, 0 ); // invoke Time2 constructor with three arguments |
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15 | } // end Time2 no-argument constructor |
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16 | |
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17 | // Time2 constructor: hour supplied, minute and second defaulted to 0 |
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18 | public Time2( int h ) |
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19 | { |
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20 | this( h, 0, 0 ); // invoke Time2 constructor with three arguments |
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21 | } // end Time2 one-argument constructor |
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22 | |
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23 | // Time2 constructor: hour and minute supplied, second defaulted to 0 |
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24 | public Time2( int h, int m ) |
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25 | { |
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26 | this( h, m, 0 ); // invoke Time2 constructor with three arguments |
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27 | } // end Time2 two-argument constructor |
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28 | |
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29 | // Time2 constructor: hour, minute and second supplied |
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30 | public Time2( int h, int m, int s ) |
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31 | { |
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32 | setTime( h, m, s ); // invoke setTime to validate time |
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33 | } // end Time2 three-argument constructor |
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34 | |
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35 | // Time2 constructor: another Time2 object supplied |
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36 | public Time2( Time2 time ) |
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37 | { |
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38 | // invoke Time2 three-argument constructor |
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39 | this( time.getHour(), time.getMinute(), time.getSecond() ); |
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40 | } // end Time2 constructor with a Time2 object argument |
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41 | |
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42 | // Set Methods |
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43 | // set a new time value using universal time; ensure that |
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44 | // the data remains consistent by setting invalid values to zero |
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45 | public void setTime( int h, int m, int s ) |
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46 | { |
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47 | setHour( h ); // set the hour |
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48 | setMinute( m ); // set the minute |
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49 | setSecond( s ); // set the second |
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50 | } // end method setTime |
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51 | |
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52 | // validate and set hour |
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53 | public void setHour( int h ) |
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54 | { |
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55 | hour = ( ( h >= 0 && h < 24 ) ? h : 0 ); |
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56 | } // end method setHour |
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57 | |
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58 | // validate and set minute |
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59 | public void setMinute( int m ) |
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60 | { |
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61 | minute = ( ( m >= 0 && m < 60 ) ? m : 0 ); |
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62 | } // end method setMinute |
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63 | |
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64 | // validate and set second |
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65 | public void setSecond( int s ) |
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66 | { |
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67 | second = ( ( s >= 0 && s < 60 ) ? s : 0 ); |
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68 | } // end method setSecond |
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69 | |
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70 | // Get Methods |
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71 | // get hour value |
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72 | public int getHour() |
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73 | { |
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74 | return hour; |
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75 | } // end method getHour |
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76 | |
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77 | // get minute value |
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78 | public int getMinute() |
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79 | { |
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80 | return minute; |
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81 | } // end method getMinute |
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82 | |
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83 | // get second value |
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84 | public int getSecond() |
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85 | { |
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86 | return second; |
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87 | } // end method getSecond |
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88 | |
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89 | // convert to String in universal-time format (HH:MM:SS) |
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90 | public String toUniversalString() |
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91 | { |
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92 | return String.format( |
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93 | "%02d:%02d:%02d", getHour(), getMinute(), getSecond() ); |
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94 | } // end method toUniversalString |
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95 | |
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96 | // convert to String in standard-time format (H:MM:SS AM or PM) |
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97 | public String toString() |
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98 | { |
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99 | return String.format( "%d:%02d:%02d %s", |
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100 | ( (getHour() == 0 || getHour() == 12) ? 12 : getHour() % 12 ), |
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101 | getMinute(), getSecond(), ( getHour() < 12 ? "AM" : "PM" ) ); |
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102 | } // end method toString |
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103 | } // end class Time2 |
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104 | |
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105 | /************************************************************************** |
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106 | * (C) Copyright 1992-2005 by Deitel & Associates, Inc. and * |
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107 | * Pearson Education, Inc. All Rights Reserved. * |
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108 | * * |
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109 | * DISCLAIMER: The authors and publisher of this book have used their * |
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110 | * best efforts in preparing the book. These efforts include the * |
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111 | * development, research, and testing of the theories and programs * |
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112 | * to determine their effectiveness. The authors and publisher make * |
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113 | * no warranty of any kind, expressed or implied, with regard to these * |
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114 | * programs or to the documentation contained in these books. The authors * |
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115 | * and publisher shall not be liable in any event for incidental or * |
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116 | * consequential damages in connection with, or arising out of, the * |
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117 | * furnishing, performance, or use of these programs. * |
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118 | *************************************************************************/ |
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