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Thank you. I understand now what really is.

So it is like


class Anonymous implements ActionListener
{
public void actionPerformed(ActionEvent e) {
System.out.println("Counter = " +...

Thanks. Is it a short way of writing class a implements ActionListener ?

But how can you define class into constructor?

Hello!

I got the following code:



import javax.swing.JFrame;
import javax.swing.Timer;

class MainClass extends JFrame {