I have made a swing application with a jTable. The data is fetched from the database and shown in the table using the following function in the class constructor.
public void Updatetable(){
try{
String query = "SELECT * FROM stock;";
pst = connection.prepareStatement(query);
rs = pst.executeQuery();
jTable1.setModel(DbUtils.resultSetToTableModel(rs));
}
catch (Exception e){
e.printStackTrace();
}
}
This code works fine here. I have then implemented a delete function. It takes the selected row and deletes the corresponding data from the database. It does that perfectly and deletes the data from the database. Now i also need to refresh the table. For that i use the same Updatetable()
function but i get the error this time and the program hangs and does not respond.
this is the delete method:
try{
int row = jTable1.getSelectedRow();
String cell = jTable1.getModel().getValueAt(row, 0).toString();
String sql = "DELETE from stock WHERE id=" + cell;
pst = connection.prepareStatement(sql);
pst.execute();
JOptionPane.showMessageDialog(null, "Deleted successfully");
}
catch (Exception e){
JOptionPane.showMessageDialog(null, "An error occured");
}
Updatetable(); //here i have called the same function.
}
This is the start of the code along with constructor
public class mainpage extends javax.swing.JFrame {
Connection connection;
ResultSet rs;
PreparedStatement pst;
CardLayout cl;
public mainpage() {
initComponents();
pack();
setLocationRelativeTo(null);
connection = database.Connector();
if (connection==null) System.exit(1);
show_product();
combo();
combomain();
editcombo();
}
This is the database class:
public class database {
public String conn;
public static Connection Connector(){
try{
Class.forName("org.sqlite.JDBC");
Connection conn = DriverManager.getConnection("jdbc:sqlite:users.db");
return conn;
} catch (Exception e){
return null;
}
}
}
The error trace is as follows:
Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 1 >= 1
at java.util.Vector.elementAt(Vector.java:477)
at javax.swing.table.DefaultTableModel.getValueAt(DefaultTableModel.java:648)
at javax.swing.JTable.getValueAt(JTable.java:2720)
at javax.swing.JTable.prepareRenderer(JTable.java:5712)
at javax.swing.plaf.synth.SynthTableUI.paintCell(SynthTableUI.java:683)
at javax.swing.plaf.synth.SynthTableUI.paintCells(SynthTableUI.java:580)
at javax.swing.plaf.synth.SynthTableUI.paint(SynthTableUI.java:364)
at javax.swing.plaf.synth.SynthTableUI.update(SynthTableUI.java:275)
at javax.swing.JComponent.paintComponent(JComponent.java:780)
at javax.swing.JComponent.paint(JComponent.java:1056)
at javax.swing.JComponent.paintToOffscreen(JComponent.java:5210)
at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1579)
at javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1502)
at javax.swing.RepaintManager.paint(RepaintManager.java:1272)
at javax.swing.JComponent._paintImmediately(JComponent.java:5158)
at javax.swing.JComponent.paintImmediately(JComponent.java:4969)
at javax.swing.RepaintManager$4.run(RepaintManager.java:831)
at javax.swing.RepaintManager$4.run(RepaintManager.java:814)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:814)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:789)
at javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:738)
at javax.swing.RepaintManager.access$1200(RepaintManager.java:64)
at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1732)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
Any advice on how to handle this would be appreciated.