How to add action on a button from a different class.

Question

Am trying to improve my code on graph ical user interface, and i have been adviced to create a class implementing actionlistener separately from the class implementing the interface, not as an inner class. I have tried the implementation but am getting an error when i pass an instance of the class implementing actionlistener as a parameter of addActionPerformed on a button.

I have tried my best to explain, hope am understood. If yes, my u guys help me here..

Answer 1

So does it mean no one in hear knows how to do this?

Answer 2

Here is the answer to this:

For illustration,
lets create a simple javax swing button in one class and add an action listener in a separate class.

import javax.swing.*;

public class MybuttonClass{
private JButton button = new JButton("My Button");

public static void main(String[] args){
new ButtonActionClass(button);
}
}

Above is a class called Mybutton class with a private button named button. The my button class has a main function which calls the constructor of another class called ButtonActionClass, and pass the button variable as a parameter of the constructor.

Now, how should the class to implement the action of button look like? See here

import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class ButtonActionClass implements ActionListener{
public ButtonActionClass(JButton button){
button.addActionListener(this);
}
@Override
public void actionPerformed(ActionEvent evt){
//here goes code which should be executed when button is clicked
}
}