I'm trying to build my first JAVA Swing application using the MVC pattern. But I dont quite crasp it. Especially not on how to code it. I read a lot on this site and other sites about MVC. This is one of the things I read about MVC: The MVC pattern and SWING
http://www.tutorialspoint.com/design_pattern/mvc_pattern.htm
I am fairly new to developing and want to start from the beginning using best practices.
What I think I understand about the MVC pattern is you have a Controller a Model and a View. The Controller gets it input from the View. Then the Controller ask the Model to change it state. Gets the state back from the Model and does everyting it needs to do with the input like storing it to a database or change the View with what it gets back from the database.
For example if a button "add Address" is clicked it gets the input from the textfields in the View. The Controller updates the Model and saves the data it gets from the View into the database. If the button "search Addres" is clicked it gets it input from the textfield in the View searches the database and if it gets data back it updates the Model and outputs it in the View.
If what I think to know about MVC is right how do I code this?
Is it possible to explane it using the code I have so far?
How can I get the data from the View to the Controller and on to the Model?
This is my code so far:
View JFrame
public class WolffAddressManagerMVCJFrameVIEW extends javax.swing.JFrame {
/**
* Creates new form StoringAdresses1JFrame
*/
public WolffAddressManagerMVCJFrameVIEW() {
initComponents();
}
@SuppressWarnings("unchecked")
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
jLabel4 = new javax.swing.JLabel();
jLabel5 = new javax.swing.JLabel();
jLabel6 = new javax.swing.JLabel();
jLabel7 = new javax.swing.JLabel();
firstName = new javax.swing.JTextField();
lastName = new javax.swing.JTextField();
emailAdress = new javax.swing.JTextField();
searchEmailAdress = new javax.swing.JTextField();
removeEmailAddress = new javax.swing.JTextField();
street = new javax.swing.JTextField();
number = new javax.swing.JTextField();
additive = new javax.swing.JTextField();
zipCode = new javax.swing.JTextField();
city = new javax.swing.JTextField();
addAdress = new javax.swing.JButton();
removeAdress = new javax.swing.JButton();
searchAdress = new javax.swing.JButton();
jPanel2 = new javax.swing.JPanel();
jScrollPane1 = new javax.swing.JScrollPane();
showInputOutput = new javax.swing.JTextArea();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder(null, "Address Input Fields", javax.swing.border.TitledBorder.DEFAULT_JUSTIFICATION, javax.swing.border.TitledBorder.DEFAULT_POSITION, new java.awt.Font("Trebuchet MS", 1, 14))); // NOI18N
jLabel1.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N
jLabel1.setText("First Name:");
jLabel2.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N
jLabel2.setText("Last Name:");
jLabel3.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N
jLabel3.setText("Email Adress:");
jLabel4.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N
jLabel4.setText("Street / Number / Add");
jLabel5.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N
jLabel5.setText("Zipcode / City");
jLabel6.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N
jLabel6.setText("Email Address:");
jLabel7.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N
jLabel7.setText("Email Address:");
firstName.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N
lastName.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N
emailAdress.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N
street.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N
number.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N
additive.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N
zipCode.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N
city.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N
addAdress.setFont(new java.awt.Font("Trebuchet MS", 1, 14)); // NOI18N
addAdress.setText("Add Address");
ActionListener actionListener = new MainWindowActionListenerMVCVIEW(firstName, lastName, emailAdress, street, number, additive, zipCode, city, searchEmailAdress, removeEmailAddress);
addAdress.addActionListener(actionListener);
removeAdress.setFont(new java.awt.Font("Trebuchet MS", 1, 14)); // NOI18N
removeAdress.setText("Remove Address");
removeAdress.setBackground(Color.RED);
removeAdress.addActionListener(actionListener);
searchAdress.setFont(new java.awt.Font("Trebuchet MS", 1, 14)); // NOI18N
searchAdress.setText("Search Address");
searchAdress.addActionListener(actionListener);
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jLabel3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jLabel4, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jLabel5, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jLabel6, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jLabel7, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(firstName)
.addComponent(lastName)
.addComponent(emailAdress)
.addComponent(searchEmailAdress)
.addComponent(removeEmailAddress)
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(street, javax.swing.GroupLayout.PREFERRED_SIZE, 147, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(number, javax.swing.GroupLayout.DEFAULT_SIZE, 49, Short.MAX_VALUE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(additive, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addGap(8, 8, 8))
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(zipCode, javax.swing.GroupLayout.PREFERRED_SIZE, 114, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(city)
.addContainerGap())))
.addGroup(jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(addAdress, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(removeAdress, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(searchAdress, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addContainerGap())
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(2, 2, 2)
.addComponent(firstName, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(lastName, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(emailAdress, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel4, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(street, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(number, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(additive, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel5, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(zipCode, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(city, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(41, 41, 41)
.addComponent(addAdress, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(removeEmailAddress, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel7, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(18, 18, 18)
.addComponent(removeAdress, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(searchEmailAdress, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel6, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(18, 18, 18)
.addComponent(searchAdress, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(203, Short.MAX_VALUE))
);
jPanel2.setBorder(javax.swing.BorderFactory.createTitledBorder(null, "Show Input / Show Search", javax.swing.border.TitledBorder.DEFAULT_JUSTIFICATION, javax.swing.border.TitledBorder.DEFAULT_POSITION, new java.awt.Font("Trebuchet MS", 1, 14))); // NOI18N
showInputOutput.setFont(new java.awt.Font("Trebuchet MS", 1, 14)); // NOI18N
jScrollPane1.setViewportView(showInputOutput);
javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
jPanel2.setLayout(jPanel2Layout);
jPanel2Layout.setHorizontalGroup(
jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 349, Short.MAX_VALUE)
);
jPanel2Layout.setVerticalGroup(
jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jScrollPane1)
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
pack();
}
private javax.swing.JButton addAdress;
private javax.swing.JButton removeAdress;
private javax.swing.JButton searchAdress;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JLabel jLabel4;
private javax.swing.JLabel jLabel5;
private javax.swing.JLabel jLabel6;
private javax.swing.JLabel jLabel7;
public javax.swing.JTextArea showInputOutput;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel jPanel2;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTextField firstName;
private javax.swing.JTextField lastName;
private javax.swing.JTextField emailAdress;
private javax.swing.JTextField searchEmailAdress;
private javax.swing.JTextField removeEmailAddress;
private javax.swing.JTextField street;
private javax.swing.JTextField number;
private javax.swing.JTextField additive;
private javax.swing.JTextField zipCode;
private javax.swing.JTextField city;
}
View ActionListener
public class MainWindowActionListenerMVCVIEW implements ActionListener {
public JTextField firstName, lastName, emailAddress, street, number, additive, zipCode, city, searchEmailAdress, removeEmailAddress;
public MainWindowActionListenerMVCVIEW(JTextField fName, JTextField lName, JTextField eAddress, JTextField streetName, JTextField houseNumber, JTextField add, JTextField zCode, JTextField cityName, JTextField searchEAdress, JTextField removeEAddress) {
this.firstName = fName;
this.lastName = lName;
this.emailAddress = eAddress;
this.street = streetName;
this.number = houseNumber;
this.additive = add;
this.zipCode = zCode;
this.city = cityName;
this.searchEmailAdress = searchEAdress;
this.removeEmailAddress = removeEAddress;
}
@Override
public void actionPerformed(ActionEvent e) {
firstName.getText();
lastName.getText();
emailAddress.getText();
street.getText();
number.getText();
additive.getText();
zipCode.getText();
city.getText();
searchEmailAdress.getText();
removeEmailAddress.getText();
System.out.println("test" + " " + firstName.getText()); // I put this in just te see if the *ActionListener* works
}
}
Model
public class WolffAddressManagerMVCMODEL {
public String firstName;
public String lastName;
public String emailAddress;
public String street;
public String number;
public String additive;
public String zipCode;
public String city;
}
Controller
public class WolffAddressManagerMVCController {
public WolffAddressManagerMVCMODEL controllerModel;
public MainWindowActionListenerMVCVIEW controllerActionListener;
public WolffAddressManagerMVCJFrameVIEW controllerJFrame;
private Connection connect = null;
private final Statement statement = null;
private PreparedStatement preparedStatement = null;
private ResultSet resultSet = null;
public ArrayList<String> queryResultSet = new ArrayList();
public void saveAddressToDataBase(MainWindowActionListenerMVCVIEW controller) throws Exception {
try {
Class.forName("com.mysql.jdbc.Driver");
connect = DriverManager.getConnection("jdbc:mysql://localhost/dev?" + "user=root&password=password");
preparedStatement = connect.prepareStatement("SELECT email FROM dev.addresses WHERE email= '" + controller.emailAddress.getText() + "'");
resultSet = preparedStatement.executeQuery();
if(resultSet.next()) {
JOptionPane.showMessageDialog(null, "Email already exist", "InfoBox: " + "Error", JOptionPane.INFORMATION_MESSAGE);
} else {
preparedStatement = connect.prepareStatement("INSERT INTO dev.addresses (firstname, lastname, email, street, housenumber, additve, zipcode, city) VALUES(?, ?, ?, ?, ?, ?, ?, ?)");
preparedStatement.setString(1, controller.firstName.getText());
preparedStatement.setString(2, controller.lastName.getText());
preparedStatement.setString(3, controller.emailAddress.getText());
preparedStatement.setString(4, controller.street.getText());
preparedStatement.setString(5, controller.number.getText());
preparedStatement.setString(6, controller.additive.getText());
preparedStatement.setString(7, controller.zipCode.getText());
preparedStatement.setString(8, controller.city.getText());
preparedStatement.executeUpdate();
}
} catch (ClassNotFoundException | SQLException | HeadlessException e) {
throw e;
} finally {
close();
}
}
public void searchAddress(String emailAddress) throws Exception {
try {
Class.forName("com.mysql.jdbc.Driver");
// Setup the connection with the DB
connect = DriverManager.getConnection("jdbc:mysql://localhost/dev?" + "user=root&password=fiat128slc");
preparedStatement = connect.prepareStatement("SELECT * FROM dev.addresses WHERE email= '" + emailAddress + "'");
resultSet = preparedStatement.executeQuery();
if(resultSet.isBeforeFirst()) {
while(resultSet.next()) {
queryResultSet.add(resultSet.getString("firstname"));
queryResultSet.add(resultSet.getString("lastname"));
queryResultSet.add(resultSet.getString("email"));
queryResultSet.add(resultSet.getString("street"));
queryResultSet.add(resultSet.getString("housenumber"));
queryResultSet.add(resultSet.getString("additve"));
queryResultSet.add(resultSet.getString("zipcode"));
queryResultSet.add(resultSet.getString("city"));
}
} else {
JOptionPane.showMessageDialog(null, "Email doesn't exist", "InfoBox: " + "Error", JOptionPane.INFORMATION_MESSAGE);
}
} catch (ClassNotFoundException | SQLException | HeadlessException e) {
throw e;
} finally {
close();
}
}