How do you call a class's function from it's child button's callback (i.e. click method)?

Question

I have a panel, in which there are a few buttons. Just for simplicity I'll just use one button in this example. I need each of the button's callback (i.e. click event) to be able to call a common function (in this case here in my code it's testFunction).

No matter what I try I keep getting errors. Here is my code:

private class ConnectionPanel extends JPanel {
    JButton m_b3 = new JButton("5%"); 
    
        public void testFunction()
        {
            System.out.println("inside testFunction"); 
        }
    
        m_b3.addActionListener(new java.awt.event.ActionListener()
        {
           @Override public void actionPerformed(java.awt.event.ActionEvent evt)
                {

                    getParent().testFunction();  // this give me "Cannot find symbol"
                    getRoot.testFunction(); // same, gives me "Cannot find symbol" 
                    parent.testFunction(); // gives me "Parent is not public in component" 

Answer 1

The answer is to pass the reference to the parent class, so the callback would look like this: // Take fast 5% m_b3.addActionListener(new java.awt.event.ActionListener() { @Override public void actionPerformed(java.awt.event.ActionEvent evt) { m_connectionPanel.testFunction();