Java 버튼 클릭 이벤트 리스너

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

public class InnerClassListener extends JFrame {
	InnerClassListener() {
		setTitle("Action 이벤트 리스너 작성");
		setLayout(new FlowLayout());
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setSize(300, 300);
		setVisible(true);
		JButton btn = new JButton("Action");
		btn.addActionListener(new MyActionListener());
		add(btn);
	}

	private class MyActionListener implements ActionListener {
		public void actionPerformed(ActionEvent e) {
			JButton b = (JButton) e.getSource();
			if (b.getText().equals("Action"))
				b.setText("액션");
			else
				b.setText("Action");
			// InnerClassListener의 멤버나 JFrame의 멤버 호출
			setTitle(b.getText()); // JFrame.setTitle() 호출
		}
	}

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

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

public class AnonymousClassListener extends JFrame {
	AnonymousClassListener() {
		setTitle("Action 이벤트 리스너 작성");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setLayout(new FlowLayout());
		setSize(300, 300);
		setVisible(true);
		JButton btn = new JButton("Action");
		add(btn);
		btn.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				JButton b = (JButton) e.getSource();
				if (b.getText().equals("Action"))
					b.setText("액션");
				else
					b.setText("Action"); // AnonymousClassListener의 멤버나
				// JFrame의 멤버를 호출할 수 있음
				setTitle(b.getText());
			}
		});
	}

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