microwaveoven.java

微波炉模拟应用程序,创建属于自己的类及其对象!

            }

         } // end anonymous inner class

      ); // end call to addActionListener

      // set up startJButton
      startJButton = new JButton();
      startJButton.setBounds( 7, 171, 64, 24 );
      startJButton.setText( "Start" );
      controlJPanel.add( startJButton );
      startJButton.addActionListener(

         new ActionListener() // anonymous inner class
         {
            // event handler called when startJButton is pressed
            public void actionPerformed( ActionEvent event )
            {
               startJButtonActionPerformed( event );
            }

         } // end anonymous inner class

      ); // end call to addActionListener

      // set up clearJButton
      clearJButton = new JButton();
      clearJButton.setBounds( 79, 171, 64, 24 );
      clearJButton.setText( "Clear" );
      controlJPanel.add( clearJButton );
      clearJButton.addActionListener(

         new ActionListener() // anonymous inner class
         {
            // event handler called when clearJButton is pressed
            public void actionPerformed( ActionEvent event )
            {
               clearJButtonActionPerformed( event );
            }

         } // end anonymous inner class

      ); // end call to addActionListener

      // set up timerActionListener
      ActionListener timerActionListener = 

         new ActionListener() // anonymous inner class
         {
            // event handler called every 1000 milliseconds
            public void actionPerformed( ActionEvent event )
            {
               clockTimerActionPerformed( event );
            }

         }; // end anonymous inner class

      // set up clockTimer
      clockTimer = new Timer( 1000, timerActionListener );

      // set properties of application's window
      setTitle( "Microwave Oven" ); // set title bar string
      setSize( 536, 261 );          // set window size
      setVisible( true );           // display window

   } // end method createUserInterface

   // add digit 1 to timeToDisplay
   private void oneJButtonActionPerformed( ActionEvent event )
   {
      displayTime( "1" ); // display time input properly

   } // end method oneJButtonActionPerformed

   // add digit 2 to timeToDisplay
   private void twoJButtonActionPerformed( ActionEvent event )
   {
      displayTime( "2" ); // display time input properly

   } // end method twoJButtonActionPerformed

   // add digit 3 to timeToDisplay
   private void threeJButtonActionPerformed( ActionEvent event )
   {
      displayTime( "3" ); // display time input properly

   } // end method threeJButtonActionPerformed

   // add digit 4 to timeToDisplay
   private void fourJButtonActionPerformed( ActionEvent event )
   {
      displayTime( "4" ); // display time input properly

   } // end method fourJButtonActionPerformed

   // add digit 5 to timeToDisplay
   private void fiveJButtonActionPerformed( ActionEvent event )
   {
      displayTime( "5" ); // display time input properly

   } // end method fiveJButtonActionPerformed

   // add digit 6 to timeToDisplay
   private void sixJButtonActionPerformed( ActionEvent event )
   {
      displayTime( "6" ); // display time input properly

   } // end method sixJButtonActionPerformed

   // add digit 7 to timeToDisplay
   private void sevenJButtonActionPerformed( ActionEvent event )
   {
      displayTime( "7" ); // display time input properly

   } // end method sevenJButtonActionPerformed

   // add digit 8 to timeToDisplay
   private void eightJButtonActionPerformed( ActionEvent event )
   {
      displayTime( "8" ); // display time input properly

   } // end method eightJButtonActionPerformed

   // add digit 9 to timeToDisplay
   private void nineJButtonActionPerformed( ActionEvent event )
   {
      displayTime( "9" ); // display time input properly

   } // end method nineJButtonActionPerformed
   
   // add digit 0 to timeToDisplay
   private void zeroJButtonActionPerformed( ActionEvent event )
   {
      displayTime( "0" ); // display time input properly

   } // end method zeroJButtonActionPerformed
   
   // format the time so that it has exactly four digits
   private String formatTime()
   {
      // declare String currentTime to manipulate output
      String currentTime = timeToDisplay;

      // add zeros until currentTime is at least 4 characters long
      for ( int i = currentTime.length(); i < 4; i++ )
      {
         currentTime = "0" + currentTime;
      }

      // if the length of currentTime is greater than four
      if ( currentTime.length() > 4 )
      {
         // shorten currentTime to the first four characters
         currentTime = currentTime.substring( 0, 4 );
      }

      return currentTime;

   } // end method formatTime
   
   // start the microwave oven
   private void startJButtonActionPerformed( ActionEvent event )
   {
      // get the time as four digits
      String fourDigitTime = formatTime();

      // extract minutes and seconds
      String minute = fourDigitTime.substring( 0, 2 );
      String second = fourDigitTime.substring( 2 );
      
      // initialize CookingTime object to time entered by user
      microwaveTime.setMinute( Integer.parseInt( minute ) );
      microwaveTime.setSecond( Integer.parseInt( second ) );
      
      // display formatted starting time in displayJTextField
      displayJTextField.setText( timeFormat.format( 
         microwaveTime.getMinute() ) + ":" + timeFormat.format( 
         microwaveTime.getSecond() ) );

      timeToDisplay = ""; // clear timeToDisplay for future input
      
      clockTimer.start();                         // start timer
      windowJPanel.setBackground( Color.YELLOW ); // turn "light" on

   } // end method startJButtonActionPerformed
   
   // clear the microwave oven
   private void clearJButtonActionPerformed( ActionEvent event )
   {
      // stop Timer and reset variables to their initial settings
      clockTimer.stop();
      displayJTextField.setText( "Microwave Oven" );
      timeToDisplay = "";
      windowJPanel.setBackground( new Color( 204, 204, 204 ) );

   } // end method clearJButtonActionPerformed

   // display formatted time in displayJTextField
   private void displayTime( String digit )
   {
      // append digit to timeToDisplay
      timeToDisplay += digit;

      // get the time as four digits
      String fourDigitTime = formatTime();

      // extract minutes and seconds
      String minute = fourDigitTime.substring( 0, 2 );
      String second = fourDigitTime.substring( 2 );

      // display number of minutes, ":", then number of seconds
      displayJTextField.setText( minute + ":" + second );

   } // end method displayTime
      
   // decrement displayJTextField by one second
   private void clockTimerActionPerformed( ActionEvent event )
   {
      // decrement microwaveTime by one second
      microwaveTime.tick();

      // if microwaveTime has not reached zero
      if ( !microwaveTime.isDone() )
      {
         // display remaining cooking time in displayJTextField
         displayJTextField.setText( timeFormat.format( 
            microwaveTime.getMinute() ) + ":" + timeFormat.format( 
            microwaveTime.getSecond() ) );

      } // end if
      else // microwaveTime has reached zero
      {
         clockTimer.stop(); // stop timer
         
         // inform user timer is finished
         displayJTextField.setText( "Done!" );
         windowJPanel.setBackground( new Color( 204, 204, 204 ) );

      } // end else
      
   } // end method clockTimerActionPerformed
   
   // main method
   public static void main( String args[] )
   {
      MicrowaveOven application = new MicrowaveOven();
      application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );

   } // end method main

} // end class MicrowaveOven

/**************************************************************************
 * (C) Copyright 1992-2004 by Deitel & Associates, Inc. and               *
 * Pearson Education, Inc. All Rights Reserved.                           *
 *                                                                        *
 * DISCLAIMER: The authors and publisher of this book have used their     *
 * best efforts in preparing the book. These efforts include the          *
 * development, research, and testing of the theories and programs        *
 * to determine their effectiveness. The authors and publisher make       *
 * no warranty of any kind, expressed or implied, with regard to these    *
 * programs or to the documentation contained in these books. The authors *
 * and publisher shall not be liable in any event for incidental or       *
 * consequential damages in connection with, or arising out of, the       *
 * furnishing, performance, or use of these programs.                     *
 **************************************************************************/