[JAVA][SWING]ActionListener 사용설명서

출처는 하단에 명시 해 놓았고 소스는 직접 구현 해봄

1. 첫번째 방법

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
 
@SuppressWarnings("serial")
public class ExJButtonActionListener extends JFrame {
    class MyActionListener implements ActionListener {
        @Override
        public void actionPerformed(ActionEvent e) {
            JOptionPane.showMessageDialog(null, "버튼을 누르셨군요", "Message", JOptionPane.ERROR_MESSAGE);
        }
    }
    
    public ExJButtonActionListener() {
        JButton btn = new JButton("버튼");
        ActionListener listener = new MyActionListener();
        btn.addActionListener(listener);
        
        JPanel panel = new JPanel();
        panel.add(btn);
        
        Container contentPane = getContentPane();
        contentPane.add(panel, BorderLayout.CENTER);
        
        setTitle("ExJButtonActionListener");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(300, 300);
        setVisible(true);
    }
    
    public static void main(String[] args) {
        new ExJButtonActionListener();
    }
}
 

2.  두번째 방법 (anonymous 클래스 사용)

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
 
@SuppressWarnings("serial")
public class ExJButtonActionListener2 extends JFrame {
    public ExJButtonActionListener2() {
        JButton btn = new JButton("버튼");
        btn.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                JOptionPane.showMessageDialog(null, "버튼을 누르셨군요", "Message", JOptionPane.ERROR_MESSAGE);
            }
        });
 
        JPanel panel = new JPanel();
        panel.add(btn);
 
        Container contentPane = getContentPane();
        contentPane.add(panel, BorderLayout.CENTER);
 
        setTitle("ExJButtonActionListener");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(300, 300);
        setVisible(true);
    }
 
    public static void main(String[] args) {
        new ExJButtonActionListener();
    }
}
 

출처 : ActionListener 사용법