fuzzydiceorderform.java

来自「32个java程序源代码」· Java 代码 · 共 477 行 · 第 1/2 页

         JTextField.RIGHT );
      contentPane.add( redTotalsJTextField );

      // set up subtotalJLabel
      subtotalJLabel = new JLabel();
      subtotalJLabel.setBounds( 196, 293, 72, 16 );
      subtotalJLabel.setText( "Subtotal:" );
      contentPane.add( subtotalJLabel );

      // set up subtotalJTextField
      subtotalJTextField = new JTextField();
      subtotalJTextField.setBounds( 267, 293, 87, 16 );
      subtotalJTextField.setText( "$0.00" );
      subtotalJTextField.setEditable( false );
      subtotalJTextField.setHorizontalAlignment(
         JTextField.RIGHT );
      contentPane.add( subtotalJTextField );

      // set up taxJLabel
      taxJLabel = new JLabel();
      taxJLabel.setBounds( 196, 317, 72, 16 );
      taxJLabel.setText( "Tax:" );
      contentPane.add( taxJLabel );

      // set up taxJTextField
      taxJTextField = new JTextField();
      taxJTextField.setBounds( 267, 317, 87, 16 );
      taxJTextField.setText( "$0.00" );
      taxJTextField.setEditable( false );
      taxJTextField.setHorizontalAlignment(
         JTextField.RIGHT );
      contentPane.add( taxJTextField );

      // set up discountJLabel
      discountJLabel = new JLabel();
      discountJLabel.setBounds( 196, 341, 72, 16 );
      discountJLabel.setText( "Discount:" );
      contentPane.add( discountJLabel );

      // set up discountJTextField
      discountJTextField = new JTextField();
      discountJTextField.setBounds( 267, 341, 87, 16 );
      discountJTextField.setText( "$0.00" );
      discountJTextField.setEditable( false );
      discountJTextField.setHorizontalAlignment(
         JTextField.RIGHT );
      contentPane.add( discountJTextField );

      // set up totalJLabel
      totalJLabel = new JLabel();
      totalJLabel.setBounds( 196, 365, 72, 16 );
      totalJLabel.setText( "Total:" );
      contentPane.add( totalJLabel );

      // set up totalJTextField
      totalJTextField = new JTextField();
      totalJTextField.setBounds( 267, 365, 87, 16 );
      totalJTextField.setText( "$0.00" );
      totalJTextField.setEditable( false );
      totalJTextField.setHorizontalAlignment(
         JTextField.RIGHT );
      contentPane.add( totalJTextField );
      
      // set up calculateJButton and register its event handler
      calculateJButton = new JButton();
      calculateJButton.setBounds( 267, 397, 87, 23 );
      calculateJButton.setText( "Calculate" );
      contentPane.add( calculateJButton );
      calculateJButton.addActionListener( 
      
         new ActionListener() // anonymous inner class
         {
            // method called when user clicks calculateJButton
            public void actionPerformed( ActionEvent event )
            {
               calculateJButtonActionPerformed( event );
            }
            
         } // end anonymous inner class
         
      ); // end call to addActionListener
      
      // set properties of application's window
      setTitle( "Fuzzy Dice Order Form" ); // set title bar string
      setSize( 380, 466 );                 // set window size
      setVisible( true );                  // display window
      
   } // end method createUserInterface
   
   // calculate the cost of the order
   private void calculateJButtonActionPerformed( ActionEvent event )
   {
      // get user inputs
      String orderNumber = orderNumberJTextField.getText();
      String name = nameJTextField.getText();
      String address1 = addressJTextField1.getText();
      String address2 = addressJTextField2.getText();

      // total of white/black dice ordered
      double whiteTotals = 0.0;

      // total of red/black dice ordered
      double redTotals = 0.0;

      // calculate price if white/black JCheckBox is selected
      if ( whiteTypeJCheckBox.isSelected() )
      {
         whiteTotals = Integer.parseInt( 
            whiteQuantityJTextField.getText() ) * 6.25;
      }

      // calculate price if red/black JCheckBox is selected
      if ( redTypeJCheckBox.isSelected() )
      {
         redTotals = Integer.parseInt(
            redQuantityJTextField.getText() ) * 5.00;
      }
       
      // display message if order number, name or address is empty
      if ( orderNumber.equals( "" ) || name.equals( "" ) || 
         address1.equals( "" ) || address2.equals( "" ) ||
         orderNumber.equals( "0" ) || 
         name.equals( "Enter name here" ) || 
         address1.equals( "Address Line 1" ) ||
         address2.equals( "City, State, Zip" ) )
      {
         // display message
         JOptionPane.showMessageDialog( null,
            "Please fill out all information fields.", 
            "Empty Fields", JOptionPane.WARNING_MESSAGE );
      }
      else if ( !whiteTypeJCheckBox.isSelected() && 
         !redTypeJCheckBox.isSelected() )
      {
         // display message if no JCheckBox is
         // selected and its quantity is 0
         JOptionPane.showMessageDialog( null,
            "Please select an item and enter a quantity.",
            "No Item selected", JOptionPane.WARNING_MESSAGE );
      }
      else // otherwise, calculate totals
      {
         // set display format
         DecimalFormat dollars = new DecimalFormat( "$0.00" );

         // display totals of dice ordered
         whiteTotalsJTextField.setText( dollars.format(
            whiteTotals ) );
         redTotalsJTextField.setText( dollars.format( redTotals ) );
         
         // calculate and display subtotal
         double subtotal = whiteTotals + redTotals;
         subtotalJTextField.setText( dollars.format( subtotal ) );

         // if subtotal is greater than $50 
         // display message and give 7% discount
         if ( subtotal > 50 )
         {
            JOptionPane.showMessageDialog( null, 
              "7% discount will be applied.", "Discount Offer", 
              JOptionPane.INFORMATION_MESSAGE );
              
            // calculate and display discount
            double discount = subtotal * 0.07;
            discountJTextField.setText( 
               dollars.format( -discount ) );
            
            subtotal -= discount; // calculate new subtotal
         }
         else // no discount if subtotal is not greater than 50
         {
            discountJTextField.setText( "$0.00" );
         }
         
         // calculate and display tax
         double tax = subtotal * 0.05;
         taxJTextField.setText( dollars.format( tax ) );
            
         // calculate and display total
         totalJTextField.setText( 
            dollars.format( subtotal + tax ) );
         
      } // end else

   } // end method calculateJButtonActionPerformed

   // modifying application when whiteTypeJCheckBox
   // is selected or deselected
   private void whiteTypeJCheckBoxActionPerformed(
      ActionEvent event )
   {

   } // end method whiteTypeJCheckBoxActionPerformed

   // modifying application when redTypeJCheckBox
   // is selected or deselected
   private void redTypeJCheckBoxActionPerformed( ActionEvent event )
   {

   } // end method redTypeJCheckBoxActionPerformed

   // reset components
   private void clearResults()
   {
      whiteTotalsJTextField.setText( "$0.00" );
      redTotalsJTextField.setText( "$0.00" );
      subtotalJTextField.setText( "$0.00" );
      taxJTextField.setText( "$0.00" );
      discountJTextField.setText( "$0.00" );
      totalJTextField.setText( "$0.00" );

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

   } // end method main
   
} // end class FuzzyDiceOrderForm

 /**************************************************************************
  * (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.                     *
  **************************************************************************/