import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;
    import javax.swing.table.DefaultTableModel;

    public class ex1 extends JFrame implements ActionListener {

            /**
             *
             */
            private static final long serialVersionUID = 1L;
            private javax.swing.JButton AddBtn, perviousBtn, NextBtn;

            private javax.swing.JLabel LatLabel, LongLabel, EvlLabel;
            private javax.swing.JTextField LatText, LongText, EvlText;
        JTable table;
        DefaultTableModel model;
            String columns[] = { "ID", "Name", "Age", "Gender" };
            Object data[][] = { { "0", "Tom", new Integer(20), "Male" },
                            { "1", "Tina", new Integer(18), "Female" },
                            { "2", "Raj", new Integer(19), "Male" },
                            { "3", "Tina", new Integer(18), "Female" },
                            { "4", "Raj", new Integer(19), "Male" },
                            { "5", "Tina", new Integer(18), "Female" }

            };
//            DefaultTableModel model = new DefaultTableModel(data, columns);
//
            public void actionPerformed(ActionEvent evt) {
                     Object src = evt.getSource();
                if (src == AddBtn) {
                        System.out.println("HELLOO");
                        String nextRowId = Integer.toString(model.getRowCount());
                        model.addRow(new Object[] { nextRowId, LatText.getText(),
                                        LongText.getText(), EvlText.getText() });
            model.fireTableStructureChanged();

                } else if (src == NextBtn) {

                } else if (src == perviousBtn) {

                }
            }

            public void addComponentsToPane(final Container pane) {

                model = new DefaultTableModel(data, columns);

                    JPanel compsToExperiment = new JPanel();
                    GridLayout experimentLayout = new GridLayout(3, 3);
                    compsToExperiment.setLayout(experimentLayout);
                    JPanel Table = new JPanel();
                    Table.setLayout(new GridLayout(0, 1));
                    JPanel nav = new JPanel();
                    nav.setLayout(new GridLayout(8, 3));

                    LatLabel = new javax.swing.JLabel("Latitude: ");
                    LongLabel = new javax.swing.JLabel("Longitude: ");
                    EvlLabel = new javax.swing.JLabel("Elevation: ");
                    LatText = new javax.swing.JTextField();
                    LongText = new javax.swing.JTextField();
                    EvlText = new javax.swing.JTextField();
                    AddBtn = new javax.swing.JButton("Add");
                    perviousBtn = new javax.swing.JButton("Next");
                    NextBtn = new javax.swing.JButton("pervious");

                    // perviousBtn.setPreferredSize(new Dimension(60, 60));

                    compsToExperiment.add(LatLabel);
                    compsToExperiment.add(LongLabel);
                    compsToExperiment.add(EvlLabel);

                    compsToExperiment.add(LatText);
                    compsToExperiment.add(LongText);
                    compsToExperiment.add(EvlText);
                    compsToExperiment.add(AddBtn);
                    AddBtn.addActionListener(this);
                    // AddBtn.addActionListener(this);
                    // AddBtn.addActionListener(this);


        table = new JTable(model);

                    Table.add(table.getTableHeader());
                    Table.add(table);

                    nav.add(NextBtn);
                    nav.add(perviousBtn);

                    pane.add(compsToExperiment, BorderLayout.NORTH);
                    pane.add(nav, BorderLayout.EAST);
                    pane.add(Table, BorderLayout.CENTER);
            }

            /**
             * Create the GUI and show it. For thread safety, this method is invoked
             * from the event dispatch thread.
             */

            private static void createAndShowGUI() {

                    ex1 frame = new ex1();
                    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                    frame.addComponentsToPane(frame.getContentPane());
                    frame.setSize(500, 500);
                    // frame.pack();
                    frame.setVisible(true);
            }

            public static void main(String[] args) {

                    javax.swing.SwingUtilities.invokeLater(new Runnable() {
                            public void run() {
                                    createAndShowGUI();
                            }
                    });

            }

    }