time.java

《Java面向对象程序设计》例子源代码.轻松学习书本.

//Time.java
import java.text.DecimalFormat;  

public class Time {
   private int hour;     
   private int minute;   
   private int second;   
   private static DecimalFormat twoDigits = new DecimalFormat( "00" );
   public Time(){ 
      this( 0, 0, 0 ); 
   }
   public Time( int h ){ 
      this( h, 0, 0 ); 
   }
   public Time( int h, int m ){ 
      this( h, m, 0 ); 
   }
   public Time( int h, int m, int s ){ 
      setTime( h, m, s ); 
   }
   public Time( Time time ){
      this( time.getHour(), time.getMinute(), time.getSecond() );
   }
   public void setTime( int h, int m, int s ){
      setHour( h );   
      setMinute( m ); 
      setSecond( s ); 
   }
   public void setHour( int h ){ 
      hour = ( ( h >= 0 && h < 24 ) ? h : 0 ); 
   }
   public void setMinute( int m ){ 
      minute = ( ( m >= 0 && m < 60 ) ? m : 0 ); 
   }
   public void setSecond( int s ){ 
      second = ( ( s >= 0 && s < 60 ) ? s : 0 ); 
   }
   public int getHour(){ 
      return hour; 
   }
   public int getMinute(){ 
      return minute; 
   }
   public int getSecond(){ 
      return second; 
   }
   public String toUniversalString(){
      return twoDigits.format( getHour() ) + ":" +
         twoDigits.format( getMinute() ) + ":" +
         twoDigits.format( getSecond() );
   }
   public String toString(){
      return ( ( getHour() == 12 || getHour() == 0 ) ? 
         12 : getHour() % 12 ) + ":" + twoDigits.format( getMinute() ) +
         ":" + twoDigits.format( getSecond() ) + 
         ( getHour() < 12 ? " AM" : " PM" );
   }
}