Ich habe ein Beispiel mit aktualisierten Daten gefunden, aber es verwendet DefaultTableModel. Wenn ich mein eigenes TableModel und meine eigene Datenklasse erstellt habe, werden die Daten beim Hinzufügen zu JTable nicht aktualisiert.

Wie füge ich meinem TableModel einen Listener hinzu?

Hier ist mein Code:

package by;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.util.LinkedList;

import javax.swing.AbstractAction;
import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.AbstractTableModel;
public class DialogEg {
   private static void createAndShowGui() {
      MainWin mainPanel = new MainWin();
      JFrame frame = new JFrame("DialogEg");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.getContentPane().add(mainPanel);
      frame.pack();
      frame.setLocationByPlatform(true);
      frame.setVisible(true);
   }
   public static void main(String[] args) {
      SwingUtilities.invokeLater(new Runnable() {
         public void run() {
            createAndShowGui();
         }
      });
   }
}
class MainWin extends JPanel {
   private String[] COL_NAMES = { "Last Name", "First Name" };
   //private DefaultTableModel model = new DefaultTableModel(COL_NAMES, 0);
   private MyTableModel model = new MyTableModel();
   private JTextField lastNameField = new JTextField(15);
   private JTextField firstNameField = new JTextField(15);

   public MainWin() {
      final JPanel dataPanel = new JPanel();
      dataPanel.add(new JLabel("Last Name:"));
      dataPanel.add(lastNameField);
      dataPanel.add(Box.createHorizontalStrut(15));
      dataPanel.add(new JLabel("First Name:"));
      dataPanel.add(firstNameField);
      JPanel btnPanel = new JPanel();
      btnPanel.add(new JButton(new AbstractAction("Add Name") {
         @Override
         public void actionPerformed(ActionEvent arg0) {
            lastNameField.setText("");
            firstNameField.setText("");
            int result = JOptionPane.showConfirmDialog(MainWin.this, dataPanel,
                  "Enter Name", JOptionPane.OK_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE);
            if (result == JOptionPane.OK_OPTION) {
               String lastName = lastNameField.getText();
               String firstName = firstNameField.getText();
               Object[] dataRow = new String[] { lastName, firstName };
               //model.addRow(dataRow);
               Person person = new Person();
               person.setFirstName(firstName);
               person.setLastName(lastName);
               model.addElement(person);
               model.fireTableDataChanged();
            }
         }
      }));
      setLayout(new BorderLayout());
      JTable jtable = new JTable(model);
      //new JTable(model)
      jtable.setModel(model);
      add(new JScrollPane(jtable), BorderLayout.CENTER);
      add(btnPanel, BorderLayout.SOUTH);
   }
}
class MyTableModel extends AbstractTableModel {
    private String[] columnNames = {
            "Last name",
            "First name"
    };
    //private LinkedList<Person> data = new LinkedList<Person>();
    private LinkedList<Person> data = new LinkedList<Person>();
    public int getColumnCount() {
        return columnNames.length;
    }
    public int getRowCount() {
        return data.size();
    }
    public String getColumnName(int col) {
        return columnNames[col];
    }
    public Object getValueAt(int row,int col) {
        switch(col) {
        case 0: {
            return data.get(col).getLastName();
        }
        case 1: {
            return data.get(col).getFirstName();
        }
        default:
            return "";
        }
    }
    public void addElement(Person person) {
        data.add(person);
    }
    public void fireTableDataChanged() {

    }
}
class Person {
    String last_name;
    String first_name;
    public Person() {
    }
    public void setLastName(String l_name) {
        last_name = l_name;
    }
    public void setFirstName(String f_name) {
        first_name = f_name;
    }
    public String getLastName() {
        return last_name;
    }
    public String getFirstName() {
        return first_name;
    }
}

Edit2

Hier benutze ich die Methode addElement:

 public void actionPerformed(ActionEvent arg0) {
    lastNameField.setText("");
    firstNameField.setText("");
    int result = JOptionPane.showConfirmDialog(MainWin.this, dataPanel,
          "Enter Name", JOptionPane.OK_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE);
    if (result == JOptionPane.OK_OPTION) {
       String lastName = lastNameField.getText();
       String firstName = firstNameField.getText();

       Person person = new Person();
       person.setFirstName(firstName);
       person.setLastName(lastName);
       //here i use add element 
       model.addElement(person);
    }
 }

Da ist mein Tischmodell:

class MyTableModel extends AbstractTableModel {
    private String[] columnNames = {
            "Last name",
            "First name"
    };
    //private LinkedList<Person> data = new LinkedList<Person>();
    private LinkedList<Person> data = new LinkedList<Person>();
    public int getColumnCount() {
        return columnNames.length;
    }
    public int getRowCount() {
        return data.size();
    }
    public String getColumnName(int col) {
        return columnNames[col];
    }
    public Object getValueAt(int row,int col) {
        switch(col) {
        case 0: {
            return data.get(col).getLastName();
        }
        case 1: {
            return data.get(col).getFirstName();
        }
        default:
            return "";
        }
    }

    public void addElement(Person person) {
        int firstRow = data.size() - 1;
        int lastRow = firstRow;
        fireTableRowsInserted(firstRow, lastRow);
    }
}

Wenn ich Informationen hinzugefügt habe, diese aber nicht aktualisiert wurden. Wo muss ich diese Methode für die richtige Datenaktualisierung in jtable setzen?