Java how to update Jtable after inserting data into it.

Code

package view;



import java.awt.*;

import java.sql.*;

import java.util.*;



import javax.swing.*;

import javax.swing.table.*;



import java.awt.Dimension;

import java.util.ArrayList;



import javax.swing.JPanel;

import javax.swing.JScrollPane;

import javax.swing.JTable;



import Database.Database;



public class Table extends JPanel {

    Database db;

    JScrollPane scrollPane;



    public Table(Database db) {

        this.db = db;

        JTable table = maakTabel("Crocodile");



        scrollPane = new JScrollPane(table);

        this.add(scrollPane);



        JPanel buttonPanel = new JPanel();

        this.add(buttonPanel, BorderLayout.SOUTH);

    }



    public void veranderTabel(String animalType) {

        // hoe verwijder je een tabel

        // hoe voeg je een nieuwe tabel toe

        JTable table = maakTabel(animalType);



        this.remove(scrollPane);

        scrollPane = new JScrollPane(table);

        this.add(scrollPane);

    }



    public JTable maakTabel(String animalType) {

        ArrayList columnNames = new ArrayList();

        ArrayList data = new ArrayList();



        try {

            ResultSet rs = db.getAllAnimals();

            //ResultSet rs = db.getAnimalType(animalType);

            ResultSetMetaData md = rs.getMetaData();

            int columns = md.getColumnCount();



            // Get column names

            for (int i = 1; i <= columns; i++) {

                columnNames.add(md.getColumnName(i));

            }

            // Get row data

            while (rs.next()) {

                ArrayList row = new ArrayList(columns);



                for (int i = 1; i <= columns; i++) {

                    row.add(rs.getObject(i));

                }

                data.add(row);

            }

        } catch (SQLException e) {

        }



        Vector columnNamesVector = new Vector();

        Vector dataVector = new Vector();



        for (int i = 0; i < data.size(); i++) {

            ArrayList subArray = (ArrayList) data.get(i);

            Vector subVector = new Vector();

            for (int j = 0; j < subArray.size(); j++) {

                subVector.add(subArray.get(j));

            }

            dataVector.add(subVector);

        }



        for (int i = 0; i < columnNames.size(); i++)

            columnNamesVector.add(columnNames.get(i));



        // Create table with database data

        JTable table = new JTable(dataVector, columnNamesVector) {

            public Class getColumnClass(int column) {

                for (int row = 0; row < getRowCount(); row++) {

                    Object o = getValueAt(row, column);



                    if (o != null) {

                        return o.getClass();

                    }

                }



                return Object.class;

            }

        };



        return table;

    }

}

Code

package view;



import java.awt.Dimension;

import java.awt.GridBagConstraints;

import java.awt.GridBagLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;



import javax.swing.ButtonGroup;

import javax.swing.JButton;

import javax.swing.JComboBox;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JRadioButton;

import javax.swing.JTextField;



import mammels.Elephant;

import mammels.Human;

import reptiles.Crocodile;

import Database.Database;

import animals.Animal;



@SuppressWarnings("serial")

public class DetailsPanel extends JPanel {



    JLabel firstnameLabel = new JLabel("Firstname: ");

    JLabel weightLabel = new JLabel("Weight: ");

    JLabel lastnameLabel = new JLabel("Lastname: ");

    JLabel genderLabel = new JLabel("Female: ");



    String[] petStrings = { "Type", "Elephant", "Human", "Crocodile" };



    JComboBox<?> selector = new JComboBox<Object>(petStrings);

    JTextField firstnameField = new JTextField(10);

    JTextField weightField = new JTextField(10);

    JTextField lastnameField = new JTextField(10);



    JTextField bodycoveringField = new JTextField(10);

    // JTextField genderField = new JTextField(10);

    JTextField errorField = new JTextField(20);

    JRadioButton maleButton = new JRadioButton("Male");

    JRadioButton femaleButton = new JRadioButton("Female");



    ButtonGroup group = new ButtonGroup();

    {

        group.add(maleButton);

        group.add(femaleButton);

    }



    JButton addBtn = new JButton("Add");



    public DetailsPanel(Database db) {



        add(selector);

        lastnameField.setEditable(false);



        selector.addActionListener(new ActionListener() {



            @Override

            public void actionPerformed(ActionEvent e) {

                @SuppressWarnings("unchecked")

                JComboBox<String> combo = (JComboBox<String>) e.getSource();



                String geselecteerdeType = (String) combo.getSelectedItem();

                if (geselecteerdeType.equals("Human")) {

                    // aanzetten lastname field

                    lastnameField.setEditable(true);

                } else {

                    // uitzetten lastname field

                    lastnameField.setEditable(false);

                    lastnameField.setText("");

                }

            }

        });



        addBtn.setMaximumSize(new Dimension(120, 30));

        addBtn.setPreferredSize(new Dimension(120, 30));



        addBtn.addActionListener(new ActionListener() {



            @Override

            public void actionPerformed(ActionEvent event) {



                String firstName = firstnameField.getText();

                if (firstName.equals("")) {

                    errorField.setText("Vul een naam in");

                    return;

                }



                double weight;

                try {

                    weight = Double.parseDouble(weightField.getText());

                } catch (Exception e) {

                    errorField.setText("Vul een getal in bij gewicht");

                    return;

                }



                boolean female;

                if (maleButton.isSelected()) {

                    female = false;

                } else if (femaleButton.isSelected()) {

                    female = true;

                } else {

                    errorField.setText("Kies een geslacht");

                    return;

                }



                Animal animal = null;

                String animalType = (String) selector.getSelectedItem();



                switch (animalType) {

                    case "Human":        boolean married = false;

                        String lastName = lastnameField.getText();

                        if (lastName.equals("")) {

                        errorField.setText("Vul de achternaam in");

                        return;

                        }

                        animal = new Human(firstName, lastName, married, weight, female);

                        break;

                    case "Crocodile":    animal = new Crocodile(firstName, weight, female);

                        break;

                    case "Elephant":    animal = new Elephant(firstName, weight, female);

                        break;

                    default:            errorField.setText("Kies een type");

                        System.out.println(animalType);

                        return;                        

                }



                db.addAnimal(animal);



            }

        });



        setGrid();

    }



    public void setGrid() {

        setLayout(new GridBagLayout());



        GridBagConstraints gc = new GridBagConstraints();



        // textfields



        gc.gridx = 2;

        gc.gridy = 0;

        add(firstnameField, gc);



        gc.gridx = 2;

        gc.gridy = 1;

        add(lastnameField, gc);



        gc.gridx = 2;

        gc.gridy = 2;

        add(weightField, gc);



        gc.gridx = 5;

        gc.gridy = 0;

        // gc.gridheight = 3;

        // gc.fill = GridBagConstraints.VERTICAL;

        add(addBtn, gc);



        gc.gridx = (int) 3.5;

        gc.gridy = 1;

        add(maleButton, gc);



        gc.gridx = 4;

        gc.gridy = 1;

        add(femaleButton, gc);



        // textlabels



        gc.gridx = 0;

        gc.gridy = 0;

        add(selector, gc);



        gc.gridx = 1;

        gc.gridy = 0;

        add(firstnameLabel, gc);



        gc.gridx = 1;

        gc.gridy = 1;

        add(lastnameLabel, gc);



        gc.gridx = 1;

        gc.gridy = 2;

        add(weightLabel, gc);



errorField.setEditable(false);

        gc.gridx = 3;

        gc.gridy = 2;

        gc.gridwidth =3;

        add(errorField, gc);

    }

}