23일 차 Swing 버튼2개를 만들어서 클릭시 텍스트 변경

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

public class Action {

public static void main(String[] args) {

Frame f = new Frame();

}

}

class Frame extends JFrame {

private JButton button;

private JButton button2;

private JPanel panel;

private JLabel label;

private Listener listener = new Listener();

public Frame() {

this.setTitle("이벤트");

this.setSize(300, 200);

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

panel = new JPanel();

label = new JLabel("라벨임");

button = new JButton("버튼1");

button2 = new JButton("버튼2");

button.addActionListener(listener);

button2.addActionListener(listener);

panel.add(button);

panel.add(button2);

panel.add(label);

this.add(panel);

this.setVisible(true);

}

class Listener implements ActionListener {

@Override

public void actionPerformed(ActionEvent e) {

if (e.getSource() == button) {

if (button.getText().equals("버튼1"))

button.setText("버튼1눌림");

else if (button.getText().equals("버튼1눌림"))

button.setText("버튼1");

}

if (e.getSource() == button2) {

if (button2.getText().equals("버튼2"))

button2.setText("버튼2눌림");

else if (button2.getText().equals("버튼2눌림"))

button2.setText("버튼2");

}

}

}

}