How to run a listener which is in another class??

Question

I want to call any listener from class a to b.
For example in ClassA there exsist a button a.
And in ClassB there exsist a button b.
When I use the button A, I want to change the Button B's name.
How can I do this?

Answer 1

Thanks for all! It is ok.
This is what I did in separate classes:
A.java
import javax.swing.JButton;
import javax.swing.JPanel;
public class A extends JPanel{
     public A(){
          a= new JButton("AAA");          
          add(a);          
     public JButton a;
B.java
import javax.swing.JButton;
import javax.swing.JPanel;
public class B extends JPanel{
     public B(){          
          b= new JButton("BBB");          
          add(b);          
     public JButton b;
C.java
import javax.swing.JButton;
import javax.swing.JPanel;
public class C extends JPanel{
     public C(){          
          c= new JButton("CCC");          
          add(c);          
     public JButton c;
JFrameABC.java
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
public class JFrameABC extends JFrame implements Runnable{
     public void run(){
          final A a = new A();
        final B b = new B();
        final C c = new C();
        a.a.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent evt) {
                b.b.setText("newB");
        b.b.addActionListener(new ActionListener(){
             public void actionPerformed(ActionEvent evt) {
                  c.c.setText("newC");
        c.c.addActionListener(new ActionListener(){
             public void actionPerformed(ActionEvent evt) {
                  a.a.setText("newA");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        getContentPane().add(a, BorderLayout.NORTH);
        getContentPane().add(b, BorderLayout.CENTER);
        getContentPane().add(c, BorderLayout.SOUTH);
        pack();
        setLocationRelativeTo(null);
        setVisible(true);
RunJFrameABC.java
import java.awt.EventQueue;
public class RunJFrameABC {
    public static void main(String[] args) {
        EventQueue.invokeLater(new JFrameABC());
}---------------------------------------------------------