AnonymousClass.java

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;

public class AnonymousClass {
	public static void main(String[] args) {
		JButton b = new JButton();
		b.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
			}
		});
	}

}