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    <p>You can use a NavigationFilter for this.</p> <p>Here is an example to get you started:</p> <pre><code>import java.awt.event.*; import javax.swing.*; import javax.swing.text.*; public class NavigationFilterPrefixWithBackspace extends NavigationFilter { private int prefixLength; private Action deletePrevious; public NavigationFilterPrefixWithBackspace(int prefixLength, JTextComponent component) { this.prefixLength = prefixLength; deletePrevious = component.getActionMap().get("delete-previous"); component.getActionMap().put("delete-previous", new BackspaceAction()); component.setCaretPosition(prefixLength); } public void setDot(NavigationFilter.FilterBypass fb, int dot, Position.Bias bias) { fb.setDot(Math.max(dot, prefixLength), bias); } public void moveDot(NavigationFilter.FilterBypass fb, int dot, Position.Bias bias) { fb.moveDot(Math.max(dot, prefixLength), bias); } class BackspaceAction extends AbstractAction { public void actionPerformed(ActionEvent e) { JTextComponent component = (JTextComponent)e.getSource(); if (component.getCaretPosition() &gt; prefixLength) { deletePrevious.actionPerformed( null ); } } } public static void main(String args[]) throws Exception { JTextField textField = new JTextField("Prefix_", 20); textField.setNavigationFilter( new NavigationFilterPrefixWithBackspace(7, textField) ); JFrame frame = new JFrame("Navigation Filter Example"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.getContentPane().add(textField); frame.pack(); frame.setLocationRelativeTo( null ); frame.setVisible(true); } } </code></pre> <p>I believe this is a how a JFormattedTextField works. So I'm not sure if you can use this with a formatted text field as is may replace the default behaviour.</p>
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    1. COI'd like to thank you for your answer, NavigationFilters are clearly the correct solution. Regarding the formatted text field, an AbstractFormatter has an overrideable getNavigationFilter() which will apply one of these to the field. That would be exactly what I need.
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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