addmembers.java

这个软件是一个图书管理系统

//import the packages for using the classes in them into the program
   import java.awt.*;
   import javax.swing.*;
   import java.awt.event.*;

/**
 *A public class
 */
   public class addMembers extends JInternalFrame {
   /***************************************************************************
    ***      declaration of the private variables used in the program       ***
    ***************************************************************************/
   
   //for creating the North Panel
      private JPanel northPanel = new JPanel();
   //for creaing the North Label
      private JLabel northLabel = new JLabel("MEMBER INFORMATION");
   
   //for creating the Center Panel
      private JPanel centerPanel = new JPanel();
   //for creating an Internal Panel in the center panel
      private JPanel informationPanel = new JPanel();
   
   //for creating an array of JLabel
      private JLabel[] informationLabel = new JLabel[6];
   //for creating an array of String
      private String[] informaionString = {
         " Member ID: "," The Password: "," Rewrite the password: ",
         " Member Name: "," E-MAIL: "," Major:"};
   //for creating an array of JTextField
      private JTextField[] informationTextField = new JTextField[4];
   //for creating an array of JPasswordField
      private JPasswordField[] informationPasswordField = new JPasswordField[2];
   
   //for creating an Internal Panel in the center panel
      private JPanel insertInformationButtonPanel = new JPanel();
   //for creating a button
      private JButton insertInformationButton = new JButton("Insert the Information");
   
   //for creating the South Panel
      private JPanel southPanel = new JPanel();
   //for creating a button
      private JButton OKButton = new JButton("Exit");
   
   //create objects from another classes for using them in the ActionListener
      private toDatabase dataToDatabase;
   //for creating an array of string to store the data
      private String[] data;
   
   //for checking the password
      public boolean isPasswordCorrect() {
         String first = new String(informationPasswordField[0].getPassword());
         String second = new String(informationPasswordField[1].getPassword());
         if(first.equals(second))
            data[1] = second;
         else 
            return false;
         return true;
      }
   //for checking the information from the text field
      public boolean isCorrect() {
         data = new String[5];
         for(int i = 0; i < informationLabel.length; i++) {
            if(i == 0) {
               if(! informationTextField[i].getText().equals("")) {
                  data[i] = informationTextField[i].getText();
               }
               else
                  return false;
            }
            if(i == 1 || i == 2) {
               if(new String(informationPasswordField[i-1].getPassword()).equals(""))
                  return false;
            }
            if(i == 3 || i == 4 || i == 5) {
               if(! informationTextField[i-2].getText().equals("")) {
                  data[i-1] = informationTextField[i-2].getText();
               }
               else
                  return false;
            }
         }
         return true;
      }
   //constructor of addBooks
      public addMembers() {
      //for setting the title for the internal frame
         super("Add Members", false, true, false, true);
      //for setting the icon
         setFrameIcon(new ImageIcon(ClassLoader.getSystemResource("images/Add16.gif")));
      //for getting the graphical user interface components display area
         Container cp = getContentPane();
      
      //for setting the layout
         northPanel.setLayout(new FlowLayout(FlowLayout.CENTER));
      //for setting the font
         northLabel.setFont(new Font("Tahoma", Font.BOLD, 14));
      //for adding the label to the panel
         northPanel.add(northLabel);
      //for adding the panel to the container
         cp.add("North", northPanel);
      
      //for setting the layout
         centerPanel.setLayout(new BorderLayout());
      //for setting the border to the panel
         centerPanel.setBorder(BorderFactory.createTitledBorder("Add a new member:"));
      //for setting the layout
         informationPanel.setLayout(new GridLayout(6,2,1,1));
      /***********************************************************************
       * for adding the strings to the labels, for setting the font		   *
       * and adding these labels to the panel.							   *
       * finally adding the panel to the container						   *
       ***********************************************************************/
         for(int i = 0; i < informationLabel.length; i++) {
            informationPanel.add(informationLabel[i] = new JLabel(informaionString[i]));
            informationLabel[i].setFont(new Font("Tahoma", Font.BOLD, 11));
            if(i == 1 || i == 2) {
               informationPanel.add(informationPasswordField[i - 1] = new JPasswordField(20));
               informationPasswordField[i - 1].setFont(new Font("Tahoma", Font.PLAIN, 11));
            }
            if(i == 0) {
               informationPanel.add(informationTextField[i] = new JTextField(20));
               informationTextField[i].setFont(new Font("Tahoma", Font.PLAIN, 11));
            }
            if(i == 3 || i == 4 || i == 5) {
               informationPanel.add(informationTextField[i - 2] = new JTextField(20));
               informationTextField[i - 2].setFont(new Font("Tahoma", Font.PLAIN, 11));
            }
         }
         centerPanel.add("Center", informationPanel);
      
      /***********************************************************************
       * for setting the layout for the panel,setting the font for the button*
       * and adding the button to the panel.								   *
       * finally adding the panel to the container						   *
       ***********************************************************************/
         insertInformationButtonPanel.setLayout(new FlowLayout(FlowLayout.RIGHT));
         insertInformationButton.setFont(new Font("Tahoma", Font.BOLD, 11));
         insertInformationButtonPanel.add(insertInformationButton);
         centerPanel.add("South", insertInformationButtonPanel);
         cp.add("Center", centerPanel);
      
      /***********************************************************************
       * for setting the layout for the panel,setting the font for the button*
       * adding the button to the panel & setting the border.				   *
       * finally adding the panel to the container						   *
       ***********************************************************************/
         southPanel.setLayout(new FlowLayout(FlowLayout.RIGHT));
         OKButton.setFont(new Font("Tahoma", Font.BOLD, 11));
         southPanel.add(OKButton);
         southPanel.setBorder(BorderFactory.createEtchedBorder());
         cp.add("South", southPanel);
      
      /***********************************************************************
       * for adding the action listener to the button,first the text will be *
       * taken from the JTextField[] and make the connection for database,   *
       * after that update the table in the database with the new value      *
       ***********************************************************************/
         insertInformationButton.addActionListener(
                                 new ActionListener() {
                                    public void actionPerformed(ActionEvent ae) {
                                    //for checking if there is a missing information
                                       if(isCorrect()) {
                                          if(isPasswordCorrect()) {
                                             Thread runner = 
                                                new Thread() {
                                                   public void run() {
                                                      dataToDatabase = new toDatabase();
                                                   //for checking if there is no same information in the database
                                                      if(!dataToDatabase.isDouble("SELECT ID FROM Members WHERE MemberID = " + data[0])) {
                                                         dataToDatabase.update("INSERT INTO Members (MemberID," +
                                                                              "Password, Name, EMail, Major) VALUES (" +
                                                                              data[0] + ", '" + data[1] + "','" + data[2] + "','" + 
                                                                              data[3] + "','" + data[4] + "')");
                                                      //for setting the array of JTextField & JPasswordField to null
                                                         for(int i = 0; i < informationLabel.length; i++) {
                                                            if(i == 0)
                                                               informationTextField[i].setText(null);
                                                            if(i == 1 || i == 2)
                                                               informationPasswordField[i-1].setText(null);
                                                            if(i == 3 || i == 4 || i == 5)
                                                               informationTextField[i-2].setText(null);
                                                         }
                                                      }
                                                      else
                                                         JOptionPane.showMessageDialog(null,"Member is in the Library","Error",JOptionPane.ERROR_MESSAGE);
                                                   }
                                                };
                                             runner.start();
                                          }
                                          //if the password is wrong
                                          else
                                             JOptionPane.showMessageDialog(null,"the passowrd is wrong","Error",JOptionPane.ERROR_MESSAGE);
                                       }
                                       //if there is a missing data, then display Message Dialog
                                       else
                                          JOptionPane.showMessageDialog(null,"Please, complete the information","Warning",JOptionPane.WARNING_MESSAGE);					
                                    }
                                 });
      //for adding the action listener for the button to dispose the frame
         OKButton.addActionListener(
                                 new ActionListener() {
                                    public void actionPerformed(ActionEvent ae) {
                                       dispose();
                                    }
                                 });
      //for setting the visible to true
         setVisible(true);
      //show the internal frame
         pack();
      }
   }