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copied!<p>Have you tried this:</p> <pre><code>scrollPane.setViewportView(yourNewTable); </code></pre> <p>This should replace the component displayed in the scroll pane. Of course you can always change the model of your JTable and its columns but that would not be my preference.</p> <p>EDIT: Here is a snippet demonstrating this:</p> <pre><code>import java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.Vector; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.event.TableModelListener; import javax.swing.table.TableModel; public class Test { public static void main(String... args) { JFrame frame = new JFrame(); final Vector<String> string = new Vector<String>(); final JTable table = new JTable(getTableModel("First", 1)); final JTable table2 = new JTable(getTableModel("Second", 3)); final JButton click = new JButton("Click me"); final JScrollPane scrollPane = new JScrollPane(table); click.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { if (table2.getParent() == null) { scrollPane.setViewportView(table2); } else { scrollPane.setViewportView(table); } } }); JPanel panel = new JPanel(new BorderLayout()); panel.add(click, BorderLayout.EAST); panel.add(scrollPane); frame.getContentPane().add(panel); frame.pack(); frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); frame.setVisible(true); } private static TableModel getTableModel(final String prefix, final int colCount) { return new TableModel() { @Override public void setValueAt(Object aValue, int rowIndex, int columnIndex) { // TODO Auto-generated method stub } @Override public void removeTableModelListener(TableModelListener l) { // TODO Auto-generated method stub } @Override public boolean isCellEditable(int rowIndex, int columnIndex) { // TODO Auto-generated method stub return false; } @Override public Object getValueAt(int rowIndex, int columnIndex) { return prefix + "Hello cell (" + rowIndex + "," + columnIndex + ")"; } @Override public int getRowCount() { return 30; } @Override public String getColumnName(int columnIndex) { return "Column " + columnIndex; } @Override public int getColumnCount() { return colCount; } @Override public Class<?> getColumnClass(int columnIndex) { return String.class; } @Override public void addTableModelListener(TableModelListener l) { // TODO Auto-generated method stub } }; } } </code></pre>

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