Observer for Swing JPanel; custom component

Follow up to comp.lang.java.gui

Given that SourceTableBean extends JPanel, how can SourceTableBean send
messages to Main? Or, to turn that question around, how can Main listen
for events which SourceTableBean sends? How does the JFrame observe the
JPanel?

No, this, intentionally, isn't a single class. By definition, working on
multiple files:

thufir@arrakis:~/code$ cat beans/src/Main.java

import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

public class Main extends javax.swing.JFrame /*implements
PropertyChangeListener*/ {

    public Main() {
        initComponents();
    }

    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-
BEGIN:initComponents
    private void initComponents() {

        jScrollPane1 = new javax.swing.JScrollPane();
        text = new javax.swing.JTextArea();
        table = new SourceTableBean();

        setDefaultCloseOperation
(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        text.setColumns(20);
        text.setRows(5);
        jScrollPane1.setViewportView(text);

        getContentPane().add(jScrollPane1, java.awt.BorderLayout.NORTH);

        /*
        table.addPropertyChangeListener(new
java.beans.PropertyChangeListener() {
            public void propertyChange(java.beans.PropertyChangeEvent
evt) {
                tablePropertyChange(evt);
            }
        });*/

        //table.addPropertyChangeListener(this);
        getContentPane().add(table, java.awt.BorderLayout.CENTER);

        pack();
    }// </editor-fold>//GEN-END:initComponents

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {
                new Main().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JScrollPane jScrollPane1;
    private SourceTableBean table;
    private javax.swing.JTextArea text;
    // End of variables declaration//GEN-END:variables

}
thufir@arrakis:~/code$
thufir@arrakis:~/code$ cat beans/src/SourceTableBean.java

import java.beans.PropertyChangeSupport;

public class SourceTableBean extends javax.swing.JPanel {
    //pcs = new java.beans.PropertyChangeSupport(this);
    //PropertyChangeSupport pcs = new PropertyChangeSupport(this);

    public SourceTableBean() {
        initComponents();
    }

    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-
BEGIN:initComponents
    private void initComponents() {

        jScrollPane1 = new javax.swing.JScrollPane();
        table = new javax.swing.JTable();

        setLayout(new java.awt.BorderLayout());

        table.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {
                {"a0", "a1", "a2", "a3"},
                {"b0", "b1", "b2", "b3"}
            },
            new String [] {
                "Title 1", "Title 2", "Title 3", "Title 4"
            }
        ));
        table.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                tableMouseClicked(evt);
            }
        });
        jScrollPane1.setViewportView(table);

        add(jScrollPane1, java.awt.BorderLayout.CENTER);
    }// </editor-fold>//GEN-END:initComponents
    private void tableMouseClicked(java.awt.event.MouseEvent evt) {//GEN-
FIRST:event_tableMouseClicked
        System.out.println("\nSourceTableBean.tableMouseClicked()\t");
        int row = table.getSelectedRow();
        int col = table.getSelectedColumn();
        String val = table.getValueAt(row, col).toString();
        System.out.println("how to send " + val + " to main?");
        
    }//GEN-LAST:event_tableMouseClicked

        
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTable table;
    // End of variables declaration//GEN-END:variables
}
thufir@arrakis:~/code$

thanks,

Thufir