cashregister.java

来自「32个java程序源代码」· Java 代码 · 共 549 行 · 第 1/2 页

      pointJButton.setBounds( 145, 130, 45, 20 );
      pointJButton.setText( "." );
      contentPane.add( pointJButton );
      pointJButton.addActionListener(

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

         } // end anonymous inner class

      ); // end call to addActionListener

      // set up enterJButton
      enterJButton = new JButton();
      enterJButton.setBounds( 205, 70, 70, 20 );
      enterJButton.setText( "Enter" );
      contentPane.add( enterJButton );
      enterJButton.addActionListener(

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

         } // end anonymous inner class

      ); // end call to addActionListener
      
      // set up totalJButton
      totalJButton = new JButton();
      totalJButton.setBounds( 205, 90, 70, 20 );
      totalJButton.setText( "Total" );
      contentPane.add( totalJButton );
      totalJButton.addActionListener(

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

         } // end anonymous inner class

      ); // end call to addActionListener
      
      // set up deleteJButton
      deleteJButton = new JButton();
      deleteJButton.setBounds( 205, 110, 70, 20 );
      deleteJButton.setText( "Delete" );
      contentPane.add( deleteJButton );
      deleteJButton.addActionListener(

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

         } // end anonymous inner class

      ); // end call to addActionListener

      // set up clearJButton
      clearJButton = new JButton();
      clearJButton.setBounds( 205, 130, 70, 20 );
      clearJButton.setText( "Clear" );
      contentPane.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 subtotalJLabel;
      subtotalJLabel = new JLabel();
      subtotalJLabel.setBounds( 20, 180, 90, 20 );
      subtotalJLabel.setText( "Subtotal:" );
      contentPane.add( subtotalJLabel );
      
      // set up subtotalJTextField
      subtotalJTextField = new JTextField();
      subtotalJTextField.setBounds( 160, 180, 140, 20 );
      subtotalJTextField.setHorizontalAlignment( JTextField.RIGHT );
      subtotalJTextField.setEditable( false );
      subtotalJTextField.setText( "$0.00" );
      contentPane.add( subtotalJTextField );
      
      // set up taxJLabel
      taxJLabel = new JLabel();
      taxJLabel.setBounds( 20, 220, 60, 20 );
      taxJLabel.setText( "Tax:" );
      contentPane.add( taxJLabel );
      
      // set up taxJTextField
      taxJTextField = new JTextField();
      taxJTextField.setBounds( 160, 220, 140, 20 );
      taxJTextField.setHorizontalAlignment( JTextField.RIGHT );
      taxJTextField.setEditable( false );
      taxJTextField.setText( "$0.00" );
      contentPane.add( taxJTextField );
      
      // set up totalJLabel
      totalJLabel = new JLabel();
      totalJLabel.setBounds( 20, 260, 70, 20 );
      totalJLabel.setText( "Total:" );
      contentPane.add( totalJLabel );

      // set up totalJTextField
      totalJTextField = new JTextField();
      totalJTextField.setBounds( 160, 260, 140, 20 );
      totalJTextField.setHorizontalAlignment( JTextField.RIGHT );
      totalJTextField.setEditable( false );
      totalJTextField.setText( "$0.00" );
      contentPane.add( totalJTextField );

      // set properties of application's window
      setTitle( "Cash Register" ); // set window title
      setSize( 345, 330 );         // set window size
      setVisible( true );          // display window

   } // end method createUserInterface

   // append "0" to the amount in amountJTextField
   private void zeroJButtonActionPerformed( ActionEvent event )
   {
      amountJTextField.setText( amountJTextField.getText() + "0" );

   } // end method zeroJButtonActionPerformed

   // append "1" to the amount in amountJTextField
   private void oneJButtonActionPerformed( ActionEvent event )
   {
      amountJTextField.setText( amountJTextField.getText() + "1" );

   } // end method oneJButtonActionPerformed

   // append "2" to the amount in amountJTextField
   private void twoJButtonActionPerformed( ActionEvent event )
   {
      amountJTextField.setText( amountJTextField.getText() + "2" );

   } // end method twoJButtonActionPerformed

   // append "3" to the amount in amountJTextField
   private void threeJButtonActionPerformed( ActionEvent event )
   {
      amountJTextField.setText( amountJTextField.getText() + "3" );

   } // end method threeJButtonActionPerformed

   // append "4" to the amount in amountJTextField
   private void fourJButtonActionPerformed( ActionEvent event )
   {
      amountJTextField.setText( amountJTextField.getText() + "4" );

   } // end method fourJButtonActionPerformed

   // append "5" to the amount in amountJTextField
   private void fiveJButtonActionPerformed( ActionEvent event )
   {
      amountJTextField.setText( amountJTextField.getText() + "5" );

   } // end method fiveJButtonActionPerformed

   // append "6" to the amount in amountJTextField
   private void sixJButtonActionPerformed( ActionEvent event )
   {
      amountJTextField.setText( amountJTextField.getText() + "6" );

   } // end method sixJButtonActionPerformed

   // append "7" to the amount in amountJTextField
   private void sevenJButtonActionPerformed( ActionEvent event )
   {
      amountJTextField.setText( amountJTextField.getText() + "7" );

   } // end method sevenJButtonActionPerformed

   // append "8" to the amount in amountJTextField
   private void eightJButtonActionPerformed( ActionEvent event )
   {
      amountJTextField.setText( amountJTextField.getText() + "8" );

   } // end method eightJButtonActionPerformed

   // append "9" to the amount in amountJTextField
   private void nineJButtonActionPerformed( ActionEvent event )
   {
      amountJTextField.setText( amountJTextField.getText() + "9" );

   } // end method nineJButtonActionPerformed
   
   // append "." to the amount in amountJTextField
   private void pointJButtonActionPerformed( ActionEvent event )
   {
      amountJTextField.setText( amountJTextField.getText() + "." );

   } // end method pointJButtonActionPerformed

   // calculate and display subtotal
   private void enterJButtonActionPerformed( ActionEvent event )
   {

   } // end method enterJButtonActionPerformed
   
   // calculate and display total after taxes
   private void totalJButtonActionPerformed( ActionEvent event )
   {
   
   } // end method totalJButtonActionPerformed
   
   // clear current amount displayed in amountJTextField
   private void deleteJButtonActionPerformed( ActionEvent event )
   {
      amountJTextField.setText( "" );

   } // end method deleteJButtonActionPerformed
   
   // clear all results
   private void clearJButtonActionPerformed( ActionEvent event )
   {
      amountJTextField.setText( "" );
      subtotalJTextField.setText( "$0.00" );
      taxJTextField.setText( "$0.00" );
      totalJTextField.setText( "$0.00" );
      subtotal = 0.0; // reset subtotal to 0.0

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

   } // end method main

} // end class CashRegister

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