Check out example codes for "how to use another class in java inside of an action listenrer". It will help you in understanding the concepts better.

Code Example 1

public class SomeActionListener implements ActionListener{

    private JTextField textField1;
    private JComboBox combo1;
    private JTextField textField2;

    public SomeActionListener(JTextField textField1, JComboBox combo1, 
                                          JTextField textField2){

    public void actionPerformed(ActionEvent e) {


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