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copied!<p>Selection change can occur for a number of reasons, from the mouse, keyboard or programmatically, for example.</p> <p>You best choice might be to add a <code>ListSelectionListener</code> to the tables selection model and make your changes there. For example...</p> <pre><code>table.getSelectionModel().addListSelectionListener(new ListSelectionListener() { public void valueChanged(ListSelectionEvent e) { int row = table.getSelectedRow(); if (row != -1) { int modelRow = table.convertRowIndexToModel(row); Vector data = (Vector)((DefaultTableModel) table.getModel()).getDataVector().get(modelRow); } } }); </code></pre> <p>Which will get the column data for a specified row when the selection changes...</p> <p>Take a look at <a href="http://docs.oracle.com/javase/tutorial/uiswing/components/table.html" rel="nofollow noreferrer">How to use tables</a> which provides additional examples</p> <p><strong>Updated with working example</strong></p> <p>Because I don't have access to your database, I put this simple example together which demonstrates the basic idea</p> <p><img src="https://i.stack.imgur.com/Lyx84.gif" alt="enter image description here"></p> <pre><code>import java.awt.BorderLayout; import java.awt.EventQueue; import java.awt.GridLayout; import java.util.Vector; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.JTextField; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; import javax.swing.event.ListSelectionEvent; import javax.swing.event.ListSelectionListener; import javax.swing.table.DefaultTableModel; public class TestTable { public static void main(String[] args) { new TestTable(); } public TestTable() { EventQueue.invokeLater(new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) { } DefaultTableModel model = new DefaultTableModel(); final JTextField rollField = new JTextField(10); final JTextField nameField = new JTextField(10); final JTextField classField = new JTextField(10); final JTextField sectionField = new JTextField(10); JPanel details = new JPanel(new GridLayout(1, 4)); details.add(rollField); details.add(nameField); details.add(classField); details.add(sectionField); model.setColumnIdentifiers(new String[]{"Roll No", "Name", "Class", "Section"}); model.addRow(new String[]{"1", "Happy", "Warrior", "Inner"}); model.addRow(new String[]{"2", "Sad", "Mage", "Outter"}); model.addRow(new String[]{"3", "Jug Head", "Clown", "Outter space"}); final JTable table = new JTable(model); table.getSelectionModel().addListSelectionListener(new ListSelectionListener() { @Override public void valueChanged(ListSelectionEvent e) { int row = table.getSelectedRow(); System.out.println("Selecte table row = " + row); if (row != -1) { int modelRow = table.convertRowIndexToModel(row); System.out.println("Selecte model row = " + row); Vector data = (Vector) ((DefaultTableModel) table.getModel()).getDataVector().get(modelRow); rollField.setText(data.get(0).toString()); nameField.setText(data.get(1).toString()); classField.setText(data.get(2).toString()); sectionField.setText(data.get(3).toString()); } } }); JFrame frame = new JFrame("Testing"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setLayout(new BorderLayout()); frame.add(details, BorderLayout.NORTH); frame.add(new JScrollPane(table)); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } }); } } </code></pre> <p><strong>Updated with example overriding <code>isCellEditable</code></strong></p> <pre><code>DefaultTableModel model = new DefaultTableModel() { @Override public boolean isCellEditable(int row, int column) { return false; } }; </code></pre> <p><strong>Updated with example of closing a window when table is double clicked</strong></p> <pre><code>table.addMouseListener(new MouseAdapter() { @Override public void mouseClicked(MouseEvent e) { if (SwingUtilities.isLeftMouseButton(e) && e.getClickCount() == 2) { if (table.getSelectedRow() != -1) { SwingUtilities.getWindowAncestor(table).dispose(); } } } }); </code></pre>

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