import javax.swing.*; import javax.swing.table.DefaultTableModel; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.HashSet; public class UniqueEntryJTableDemo extends JFrame { private JTable table; private DefaultTableModel model; private JTextField textField; private HashSet<String> uniqueEntries; public UniqueEntryJTableDemo() { setTitle("Unique Entry JTable"); setDefaultCloseOperation(EXIT_ON_CLOSE); setSize(400, 300); // Initialize HashSet to store unique entries uniqueEntries = new HashSet<>(); // Create table model model = new DefaultTableModel(); model.addColumn("Name"); // Create JTable with the model table = new JTable(model); // Create JTextField for input textField = new JTextField(20); // Create JButton to add entry JButton addButton = new JButton("Add"); addButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { addEntry(); } }); // Create JPanel for input components JPanel inputPanel = new JPanel(); inputPanel.add(textField); inputPanel.add(addButton); // Add components to JFrame add(new JScrollPane(table), BorderLayout.CENTER); add(inputPanel, BorderLayout.SOUTH); } private void addEntry() { String entry = textField.getText().trim(); if (!entry.isEmpty() && !uniqueEntries.contains(entry)) { uniqueEntries.add(entry); // Add to HashSet model.addRow(new Object[]{entry}); // Add to JTable textField.setText(""); // Clear text field } else { JOptionPane.showMessageDialog(this, "Duplicate entry or empty string!", "Error", JOptionPane.ERROR_MESSAGE); } } public static void main(String[] args) { new UniqueEntryJTableDemo().setVisible(true); } }

Make sure the number of placeholders (?) in your SQL query matches the number of parameters you're trying to set

how to resolve?

yes

Each user has their own contacts, and new users must register in order to manage their own contacts.

Sir please reply sir🙏

Sir please reply sir🙏🙏🙏🙏🙏🥺

use the image path to display it in another form (in a jlabel)

Thank you sir♥️🙇‍♂️

use the image path to display it in another form (in a jlabel)

Thank you very much sir♥️🙇‍♂️

use the image path to display it in another form (in a jlabel)

use the image path to display it in another form (in a jlabel)

I try to change the connection in the dbclass it runs but it does to go through the other jframes it just says running