Return the value from JOptionPane

Question

I have made a JOptionPane which contains a JPanel. The panel contains one button and one Jtable.

JPanel p = atomicAttack.getPanel(); //make the panel and return it
JOptionPane.showOptionDialog(null, p,"Atomic Attacks", 
            JOptionPane.DEFAULT_OPTION,JOptionPane.INFORMATION_MESSAGE, 
            null, new Object[]{}, null);

and inside the JButton i have:

private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {
    selectedId=jTable1.getValueAt(jTable1.getSelectedRow(), 0).toString();
}  

I need to when the user clicks on the button, the JOption get closed and the selectedId get return from the JOptionPane?

I have seen this, but it is not exactly what i am looking for. Because the button does not return the value for me.

Answer 1

Focus on the models and things will be easier.

public static void main(String[] args) {
    DefaultTableModel tableModel = new DefaultTableModel();
    tableModel.addColumn("Selection", new Object[] { "A", "B", "C" });

    JTable table = new JTable(tableModel);
    ListSelectionModel selectionModel = table.getSelectionModel();

    JPanel p = new JPanel(new BorderLayout());
    p.add(table, BorderLayout.CENTER);

    int option = JOptionPane.showConfirmDialog(null, p, "Atomic Attacks", JOptionPane.OK_CANCEL_OPTION,
            JOptionPane.INFORMATION_MESSAGE);

    if (JOptionPane.OK_OPTION == option) {
        printSelection(selectionModel, tableModel);
    } else {
        selectionModel.clearSelection();
    }

}

private static void printSelection(ListSelectionModel selectionModel, TableModel tableModel) {
    for (int i = selectionModel.getMinSelectionIndex(); i <= selectionModel.getMaxSelectionIndex(); i++) {
        if (selectionModel.isSelectedIndex(i)) {
            Object selectedValue = tableModel.getValueAt(i, 0);
            System.out.println(selectedValue);
        }
    }
}

If you now select multiple rows

and press the ok button the result will be

A
C

If you want a single selection you can just set

ListSelectionModel selectionModel = table.getSelectionModel();      
selectionModel.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);