Hi,
I have created my TableModel and want to refresh JTable once I added a new row. What should be added to the listener to "refresh" JTable?
public class MyTableModel implements TableModel {
private Set<TableModelListener> listeners = new HashSet<TableModelListener>();
//List<Staff> staffs = Factory.getInstance().getStaffDAO().getAllStaff();
private List<Staff> staffs;
public MyTableModel(List<Staff> staffs){
this.staffs = staffs;
}
@Override
public int getRowCount() {
return staffs.size();
}
@Override
public int getColumnCount() {
return 5;
}
@Override
public String getColumnName(int columnIndex) {
switch (columnIndex){
case 0:
return "First Name";
case 1:
return "Second Name";
case 2:
return "Date";
case 3:
return "Position";
case 4:
return "Salary";
}
return "";
}
@Override
public Class<?> getColumnClass(int columnIndex) {
return Object.class;
}
@Override
public boolean isCellEditable(int rowIndex, int columnIndex) {
return true;
}
@Override
public Object getValueAt(int rowIndex, int columnIndex) {
Staff staff = staffs.get(rowIndex);
switch (columnIndex){
case 0:
return staff.getName();
case 1:
return staff.getSurname();
case 2:
return staff.getDate();
case 3:
return staff.getPosition();
case 4:
return staff.getSalary();
}
return "";
}
@Override
public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
}
@Override
public void addTableModelListener(TableModelListener l) {
}
@Override
public void removeTableModelListener(TableModelListener l) {
}
}
Here is my listener of my Add row Button:
@Override
public void actionPerformed(ActionEvent e) {
Staff staff = new Staff();
staff.setName(JOptionPane.showInputDialog("Enter First Name"));
staff.setSurname(JOptionPane.showInputDialog("Enter Second Name"));
staff.setDate(JOptionPane.showInputDialog("Enter Date"));
staff.setPosition(JOptionPane.showInputDialog("Enter Position"));
staff.setSalary(JOptionPane.showInputDialog("Enter Salary"));
try {
Factory.getInstance().getStaffDAO().addStaff(staff);
} catch (SQLException e1) {
e1.printStackTrace();
}
!!!Here should be some code that will be firing my table after adding new row!!!
}
I've tried to use method firetabledatachanged() of AbstractTableModel in my actionPerformed() but with unluck, it is appeared ClassCastException.
UPDATE 1
WorkPlaceGui.java
public class WorkPlaceGui extends JFrame implements ActionListener {
AbstractTableModel model;
JTable jTable;
JScrollPane jScrollPane;
public WorkPlaceGui()throws SQLException{
List<Staff> staffs = Factory.getInstance().getStaffDAO().getAllStaff();
for(int i = 0; i < 0; i++) {
staffs.add(new Staff("First Name " + staffs.get(i).getName(), "Second Name " + staffs.get(i).getSurname(), "Date " + staffs.get(i).getDate(), "Position " + staffs.get(i).getPosition(), "Salary " + staffs.get(i).getSalary()));
}
model = new MyTableModel(staffs);
jTable = new JTable(model);
JButton jBtnAdd = new JButton("Добавить");
JButton jBtnDel = new JButton("Удалить");
JButton jBtnUpd = new JButton("Обновить");
JButton jBtnAdmin = new JButton("Админка");
JPanel panelNorth = new JPanel();
JPanel panelCenter = new JPanel();
JPanel panelSouth = new JPanel();
jTable.setPreferredScrollableViewportSize(new Dimension(350, 150));
jScrollPane = new JScrollPane(jTable);
panelNorth.setLayout(new FlowLayout());
panelNorth.add(jBtnAdd);
panelNorth.add(jBtnDel);
panelNorth.add(jBtnUpd);
panelNorth.add(jBtnAdmin);
panelCenter.add(jScrollPane);
setLayout(new BorderLayout());
add(panelNorth, BorderLayout.NORTH);
add(panelCenter, BorderLayout.CENTER);
jBtnAdd.addActionListener(this);
setPreferredSize(new Dimension(550, 300));
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
setTitle("Staff data base");
pack();
setVisible(true);
setLocationRelativeTo(null);
}
@Override
public void actionPerformed(ActionEvent e) {
Staff staff = new Staff();
staff.setName(JOptionPane.showInputDialog("Enter First Name"));
staff.setSurname(JOptionPane.showInputDialog("Enter Second Name"));
staff.setDate(JOptionPane.showInputDialog("Enter Date"));
staff.setPosition(JOptionPane.showInputDialog("Enter Position"));
staff.setSalary(JOptionPane.showInputDialog("Enter Salary"));
try {
Factory.getInstance().getStaffDAO().addStaff(staff);
} catch (SQLException e1) {
e1.printStackTrace();
}
model.fireTableDataChanged();
}
}
MyTableModel.java
public class MyTableModel extends AbstractTableModel {
private List<Staff> staffs;
public MyTableModel(List<Staff> staffs){
this.staffs = staffs;
}
@Override
public int getRowCount() {
return staffs.size();
}
@Override
public int getColumnCount() {
return 5;
}
@Override
public Object getValueAt(int rowIndex, int columnIndex) {
Staff staff = staffs.get(rowIndex);
switch (columnIndex){
case 0:
return staff.getName();
case 1:
return staff.getSurname();
case 2:
return staff.getDate();
case 3:
return staff.getPosition();
case 4:
return staff.getSalary();
}
return "";
}
}
You've done it the hard way.
First of all, you've implemented directly from TableModel
and secondly you've failed to implement the listener requirements...
Instead, try extending from the AbstractTableModel
instead, which already includes the implementations of the listener registration and notification.
You will need to provide a method that will allow you to add a row to the table model. In this method you need to use the fireTableRowsInserted
method which will notify any tables using the model, that a new row has been added...
This is VERY, VERY basic example. It's only intention is to demonstrate the use of fireTableRowsInserted
. It uses a Swing Timer
to add a new row every 125 milliseconds until you kill it ;)
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.table.AbstractTableModel;
public class DynamicTable {
public static void main(String[] args) {
new DynamicTable();
}
public DynamicTable() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
final MyTableModel model = new MyTableModel();
JTable table = new JTable(model);
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new JScrollPane(table));
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
Timer timer = new Timer(125, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
model.addRow();
}
});
timer.start();
}
});
}
public class MyTableModel extends AbstractTableModel {
private List<String[]> rows;
public MyTableModel() {
rows = new ArrayList<>(25);
}
@Override
public int getRowCount() {
return rows.size();
}
@Override
public int getColumnCount() {
return 4;
}
@Override
public Class<?> getColumnClass(int columnIndex) {
return String.class;
}
@Override
public Object getValueAt(int rowIndex, int columnIndex) {
String[] row = rows.get(rowIndex);
return row[columnIndex];
}
public void addRow() {
int rowCount = getRowCount();
String[] row = new String[getColumnCount()];
for (int index = 0; index < getColumnCount(); index++) {
row[index] = rowCount + "x" + index;
}
rows.add(row);
fireTableRowsInserted(rowCount, rowCount);
}
}
}
Because your table model is backed by its own List
, it has no connection to your factory. It doesn't know when you add or remove objects from it. This means you become responsible for updating the model:
public class MyTableModel extends AbstractTableModel {
private List<Staff> staffs;
public MyTableModel(List<Staff> staffs){
this.staffs = staffs;
}
@Override
public int getRowCount() {
return staffs.size();
}
@Override
public int getColumnCount() {
return 5;
}
public void add(Staff staff) {
int size = getSize();
staffs.add(staff);
fireTableRowsInserted(size, size);
}
public void remove(Staff staff) {
if (staffs.contains(staff) {
int index = stafff.indexOf(staff);
staffs.remove(staff);
fireTableRowsDeleted(index, index);
}
}
@Override
public Object getValueAt(int rowIndex, int columnIndex) {
Staff staff = staffs.get(rowIndex);
switch (columnIndex){
case 0:
return staff.getName();
case 1:
return staff.getSurname();
case 2:
return staff.getDate();
case 3:
return staff.getPosition();
case 4:
return staff.getSalary();
}
return "";
}
}
And your actionPerformed
:
@Override
public void actionPerformed(ActionEvent e) {
Staff staff = new Staff();
staff.setName(JOptionPane.showInputDialog("Enter First Name"));
staff.setSurname(JOptionPane.showInputDialog("Enter Second Name"));
staff.setDate(JOptionPane.showInputDialog("Enter Date"));
staff.setPosition(JOptionPane.showInputDialog("Enter Position"));
staff.setSalary(JOptionPane.showInputDialog("Enter Salary"));
try {
Factory.getInstance().getStaffDAO().addStaff(staff);
((MyTableModel)model).add(staff);
} catch (SQLException e1) {
e1.printStackTrace();
}
}