computer.txt

很不错的一个小软件

         multiplication.setPreferredSize(new Dimension(BUTTON_WIDTH, BUTTON_HEIGHT));
         multiplication.addActionListener(this);
         vPanel5.add(multiplication); 
         
         // add the subtract button 
         JButton subtract = new JButton("-");
         subtract.setMaximumSize(new Dimension(BUTTON_WIDTH, BUTTON_HEIGHT));
         subtract.setPreferredSize(new Dimension(BUTTON_WIDTH, BUTTON_HEIGHT));
         subtract.addActionListener(this);
         vPanel5.add(subtract); 
         
         // add the plus button 
         JButton plus = new JButton("+");
         plus.setMaximumSize(new Dimension(BUTTON_WIDTH, BUTTON_HEIGHT));
         plus.setPreferredSize(new Dimension(BUTTON_WIDTH, BUTTON_HEIGHT));
         plus.addActionListener(this);
         vPanel5.add(plus);     
         
         /**
         *    line6
         */
         Box vPanel6 = Box.createVerticalBox();
         
         // add the MC button 
         mc = new JButton("MC");
         mc.setMaximumSize(new Dimension(BUTTON_WIDTH, BUTTON_HEIGHT));
         mc.setPreferredSize(new Dimension(BUTTON_WIDTH, BUTTON_HEIGHT));
         mc.addActionListener(this);
         vPanel6.add(mc);
             
         // add the C button 
         JButton c = new JButton("C");
         c.setPreferredSize(new Dimension(BUTTON_WIDTH, BUTTON_HEIGHT));
         c.setMaximumSize(new Dimension(BUTTON_WIDTH, BUTTON_HEIGHT));
         c.addActionListener(this);
         vPanel6.add(c); 
         
         // add a vertical strut 
         Component verticalStrut =
             Box.createVerticalStrut(BUTTON_HEIGHT);
         vPanel6.add(verticalStrut);
         
         // add the enter button 
         JButton enter = new JButton("=");
         enter.setMaximumSize(new Dimension(BUTTON_WIDTH, BUTTON_HEIGHT * 2));
         enter.setPreferredSize(new Dimension(BUTTON_WIDTH, BUTTON_HEIGHT * 2));
         enter.addActionListener(this);
         vPanel6.add(enter); 
         
          
         /**
         *    Buttons panel
         */
         Box buttonsPanel = Box.createHorizontalBox();
         
         buttonsPanel.add(vPanel1);
         buttonsPanel.add(vPanel2);
         buttonsPanel.add(vPanel3);
         buttonsPanel.add(vPanel4);
         buttonsPanel.add(vPanel5);
         buttonsPanel.add(vPanel6);
         
         /**********************************************************
         *    the initial state is normal calculator
         ***********************************************************/
         vPanel1.setVisible(false);
         mod.setVisible(false);
         xey.setVisible(false);
         ms.setVisible(false);
         mr.setVisible(false);
         mc.setVisible(false);
              
         return buttonsPanel;    
     }
     
     /**
     * paint the registration window.
     *
     */
     public Box paintRegistration()
     {
         Box registration = Box.createVerticalBox();
         /*
         *    title
         */
         JLabel titleRegistration = new JLabel("Bingbings Calculator Registration");
         registration.add(titleRegistration);
         
         /*
         *    information
         */
         JPanel information = new JPanel();
         information.setLayout(new GridLayout(6, 2));
         //Name
         JLabel name = new JLabel("Name:");
         nameField = new JTextField();
         information.add(name);
         information.add(nameField);
         //Street Address
         JLabel streetAddress = new JLabel("Street Address:");
         streetAddressField = new JTextField();
         information.add(streetAddress);
         information.add(streetAddressField);
         //City
         JLabel city = new JLabel("City:");
         cityField = new JTextField();
         information.add(city);
         information.add(cityField);
         //State
         JLabel state = new JLabel("State:");
         stateField = new JTextField();
         information.add(state);
         information.add(stateField);
         //Zip
         JLabel zip = new JLabel("Zip:");
         zipField = new JTextField();
         information.add(zip);
         information.add(zipField);
         //Country
         JLabel country = new JLabel("Country:");
         countryField = new JTextField();
         information.add(country);
         information.add(countryField);
         
         registration.add(information);
         /*
         *    Registration Code
         */    
         Box registrationCode = Box.createVerticalBox();
         
         JPanel registrationCodePanel = new JPanel();
         registrationCodePanel.setLayout(new FlowLayout());
         
         //registrationCodePanel.setTitle("Registration Code");
         registrationCodePanel.setBorder(new LineBorder(Color.red, 1));
         registrationCode.add(registrationCodePanel);
         
         first = new JTextField(3);
         registrationCodePanel.add(first);
         JLabel rail1 = new JLabel(" - ");
         registrationCodePanel.add(rail1);
         
         second = new JTextField(3);
         registrationCodePanel.add(second);
         JLabel rail2 = new JLabel(" - ");
         registrationCodePanel.add(rail2);
         
         third = new JTextField(3);
         JLabel rail3 = new JLabel(" - ");
         registrationCodePanel.add(third);
         registrationCodePanel.add(rail3);
         
         fourth = new JTextField(3);
         registrationCodePanel.add(fourth);
         /*
         *    buttons
         */
         JPanel buttonsReg = new JPanel();
         buttonsReg.setLayout(new FlowLayout());
         
         jButtonR = new JButton("Register");
         jButtonE = new JButton("Edit");
         JButton jButtonRe = new JButton("Return");
         jButtonR.addActionListener(this);
         jButtonE.addActionListener(this);
         jButtonRe.addActionListener(this);
         buttonsReg.add(jButtonR);
         buttonsReg.add(jButtonE);
         buttonsReg.add(jButtonRe);
         
         registrationCode.add(buttonsReg);
         
         Box registrationAndPic = Box.createHorizontalBox();
         
         registrationAndPic.add(registrationCode);
         
         jButtonE.setVisible(false);
         /*
         *    image
         */
         JLabel imageLabel = new JLabel();
         ImageIcon greatwall = new ImageIcon("greatwall.jpg");
         imageLabel.setIcon(greatwall);
         registrationAndPic.add(imageLabel);
         
         registration.add(registrationAndPic);
         
         return registration;    
     }
     
     /**
     * performe the action which sent by the window.
     *
     * @param e catch the action event of the window.
     */
     public void actionPerformed(ActionEvent e)
     {
         String actionCommand = e.getActionCommand();
         
                // exit the system
         if(actionCommand.equals("Exit"))
             System.exit(0);
                
                // return to the calculator
         else if(actionCommand.equals("Return"))
         {
             dealer.show(deckPanel, "cal");
             setTitle("Calculator");
             validate();
             pack();        
         }
                // check the register information
         else if(actionCommand.equals("Register"))
         {        
             long check = 0;
             Boolean valid = true;
             
             if(nameField.getText().trim().length() != 0)
             {
                check = calChecksum(nameField.getText().trim());            
              
                  if(check % 3 != Long.parseLong(first.getText().trim()))
                      valid = false;
                  else if(check% 5 != Long.parseLong(second.getText().trim()))
                      valid = false;
                  else if(check % 7 != Long.parseLong(third.getText().trim()))
                      valid = false;
                  else if(check % 11 != Long.parseLong(fourth.getText().trim()))
                      valid = false;
              
                  // if the information is valid, we will change the buttons
                        // and set the text field uneditable.
                        if(valid)
                  {
                      jButtonE.setVisible(true);
                      jButtonR.setVisible(false);
                      
                      nameField.setEditable(false);        
                      countryField.setEditable(false);     
                      zipField.setEditable(false);         
                      stateField.setEditable(false);       
                      cityField.setEditable(false);       
                      streetAddressField.setEditable(false);    
                      
                      first.setEditable(false);
                      second.setEditable(false);
                      third.setEditable(false); 
                      fourth.setEditable(false);
                      
                      validate();
                  }
              }
                  
         }
                // make the text field editable
         else if(actionCommand.equals("Edit"))
         {
             jButtonE.setVisible(false);
              jButtonR.setVisible(true);
                  
              nameField.setEditable(true);        
              countryField.setEditable(true);     
              zipField.setEditable(true);         
              stateField.setEditable(true);       
              cityField.setEditable(true);       
              streetAddressField.setEditable(true);    
              
              first.setEditable(true);
              second.setEditable(true);
              third.setEditable(true); 
              fourth.setEditable(true);
              validate();    
         }
         // turn to registration window
         else if(actionCommand.equals("Registration Info"))
         {
             dealer.show(deckPanel, "reg");
             
             setTitle("Registration");
             validate();
             pack();    
         }
                // turn to scientific model
         else if(actionCommand.equals("Scientific Mode"))
        {
            dealer.show(deckPanel, "cal");
            
            vPanel1.setVisible(scientificMode.isSelected());
             mod.setVisible(scientificMode.isSelected());
             xey.setVisible(scientificMode.isSelected());
             ms.setVisible(scientificMode.isSelected());
             mr.setVisible(scientificMode.isSelected());
             mc.setVisible(scientificMode.isSelected());
             if(scientificMode.isSelected())
                 setTitle("Scientific Model");
             else
                 setTitle("Normal Model");
            validate();
            pack();
        }
                // post the result
        else if(actionCommand.equals("="))
         {
                        // if the pre-operated command was "=", return the pre-step
             if(!preOperatedCommand.equals("="))
                 tail = Double.parseDouble(result.getText().trim());

             // if the two numbel are 0, we dont need calculate the result    
             if(tail!= 0.0 || head !=0.0)
             {
                 // division
                                if(operatedCommand.equals("\u00F7"))
                 {
                     if(Math.abs(tail) > 0.0000000000000000001)
                     {
                         head = head/tail;
                         result.setText(Double.toString(head));
                     }
                     else
                     {
                         JOptionPane.showMessageDialog(this, "Cannot divide by zero.");
                         head = 0.0;
                         tail = 0.0;