import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

import com.deitel.jhtp5.ch08.Time1;  // import Time1 class

public class TimeTestApplet extends JApplet implements ActionListener{

   JButton button;  
   Time1 time;
   String output;

   public void init()
   {
      button = new JButton( "Click to show result" );
  
      getContentPane().add( button );

      time = new Time1();  // calls Time1 constructor

      // append String version of time to String output
      output = "The initial universal time is: " +
         time.toUniversalString() + "\nThe initial standard time is: " +
         time.toStandardString();

      // change time and append updated time to output
      time.setTime( 13, 27, 6 ); 
      output += "\n\nUniversal time after setTime is: " + 
         time.toUniversalString() +
         "\nStandard time after setTime is: " + time.toStandardString();

      // set time with invalid values; append updated time to output
      time.setTime( 99, 99, 99 ); 
      output += "\n\nAfter attempting invalid settings: " + 
         "\nUniversal time: " + time.toUniversalString() +
         "\nStandard time: " + time.toStandardString();

      button.addActionListener( this );

   } // end init()

   public void actionPerformed( ActionEvent actionEvent )
   {
      JOptionPane.showMessageDialog( null, output,
         "Testing Class Time1", JOptionPane.INFORMATION_MESSAGE );
   }
} // end class TimeTestApplet

// Fig. 8.16: Time1.java
// Time1 class declaration maintains the time in 24-hour format.
package com.deitel.jhtp5.ch08;

import java.text.DecimalFormat; 

public class Time1 extends Object {
   private int hour;     // 0 - 23
   private int minute;   // 0 - 59
   private int second;   // 0 - 59

   // Time1 constructor initializes each instance variable to zero; 
   // ensures that each Time1 object starts in a consistent state
   public Time1()
   {
      setTime( 0, 0, 0 );
   }

   // set a new time value using universal time; perform 
   // validity checks on the data; set invalid values to zero
   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 );
   }

   // convert to String in universal-time format
   public String toUniversalString()
   {
      DecimalFormat twoDigits = new DecimalFormat( "00" );

      return twoDigits.format( hour ) + ":" +
         twoDigits.format( minute ) + ":" + twoDigits.format( second );
   }

   // convert to String in standard-time format
   public String toStandardString()
   {
      DecimalFormat twoDigits = new DecimalFormat( "00" );
      
      return ( (hour == 12 || hour == 0) ? 12 : hour % 12 ) + ":" + 
         twoDigits.format( minute ) + ":" + twoDigits.format( second ) +
         ( hour < 12 ? " AM" : " PM" );
   }

} // end class Time1