萬花筒

java TimeTest

檔名：Time.java

public class Time

{

   private int hour;
   private int minute;
   private int second;

   public void setTime( int h, int m, int s )

   {

      hour = ( ( h >= 0 && h < 24 ) ? h : 0 );
    minute = ( ( m >= 0 && m < 60 ) ? m : 0 );
    second = ( ( s >= 0 && s < 60 ) ? s : 0 );

   }

      public String toUniversalString()

      {

         return String.format( "%02d:%02d:%02d", hour, minute, second );

      }

      public String toString()

      {

         return String.format( "%02d:%02d:%02d",
                               (  ( hour == 0 || hour == 12 ) ? 12 : hour % 12  ),
                              minute, second, ( hour < 12 ? "AM" : "PM")   );

      }

}

檔名：TimeTest.java

public class TimeTest

{

   public static void main ( String args[] )

   {

      Time time = new Time();

      System.out.print( "初始國際格式時間為：" );
      System.out.println( time.toUniversalString() );
      System.out.print( "初始標準格式時間為：" );
      System.out.println( time.toString() );
      System.out.println();

      time.setTime( 13, 27, 6);
      System.out.print( "設定後國際格式時間為：" );
      System.out.println( time.toUniversalString() );
      System.out.print( "設定後標準格式時間為：" );
      System.out.println( time.toString() );
      System.out.println();

      time.setTime( 99, 99, 99 );
      System.out.println( "在嘗試非法設定值之後");
      System.out.print( "設定非法值後國際格式時間為：" );
      System.out.println( time.toUniversalString() );
      System.out.print( "設定非法值後標準格式時間為：" );
      System.out.println( time.toString() );

   }

}