How to Highlight a Selected Row in a Right-Click Menu for Java Swing JTable?

How can I make a right-click menu in Java Swing JTable that highlights the selected row?

// Sample code for setting up a JTable with right-click menu
JTable table = new JTable(data, columnNames);

JPopupMenu popupMenu = new JPopupMenu();
JMenuItem highlightItem = new JMenuItem("Highlight Row");

highlightItem.addActionListener(new ActionListener() {
    @Override
    public void actionPerformed(ActionEvent e) {
        int row = table.getSelectedRow();
        if (row != -1) {
            table.addRowSelectionInterval(row, row);
            table.repaint(); // Repaint the table to reflect the selection
        }
    }
});

popupMenu.add(highlightItem);

// Mouse listener for right-click action
table.setComponentPopupMenu(popupMenu);

In Java Swing, creating a right-click context menu for a JTable that highlights the selected row involves a few key steps: setting up a JTable, creating a JPopupMenu, and defining the behavior for when the popup menu item is clicked. This functionality enhances user experience by allowing interaction with the table through context menus.

// Configure the JTable with the right-click menu as shown above.

Causes

• User may not know how to select a row using context menus in JTable.
• Lack of visual feedback when a row is selected via right-click.

Solutions

• Implement a JPopupMenu linked to JTable for right-click actions.
• Ensure the selection of the row is visually reflected by re-rendering the table.

Mistake: Not adding the right-click action listener to the JTable.

Solution: Ensure that you set the popup menu using setComponentPopupMenu() on your JTable.

Mistake: Not checking if a row is selected before trying to highlight it.

Solution: Always check if getSelectedRow() returns -1 before accessing the row.