Action Listener 작성하기

독립된 클래스로 Action 이벤트의 리스너 작성 코드

import javax.swing.*; // JFrame
import java.awt.*; // Container
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class IndepClassListener extends JFrame{
	public IndepClassListener() {
		setTitle("Action 이벤트 리스너 예제");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		Container c=getContentPane();
		c.setLayout(new FlowLayout());
		JButton btn=new JButton("Action");
		btn.addActionListener((ActionListener) new MyActionListener());
		c.add(btn);
		
		setSize(350,150);
		setVisible(true);
	}
	public static void main(String [] args) {
		new IndepClassListener();
	}
}

class MyActionListener implements ActionListener{

	@Override
	public void actionPerformed(ActionEvent e) {
		// TODO Auto-generated method stub
		JButton b=(JButton)e.getSource();
		if(b.getText().equals("Action")) {
			b.setText("액션");
		}
		else {
			b.setText("Action");
		}
	}
	
}

 

내부 클래스로 Action 이벤트 리스너 만들기

import javax.swing.*; // JFrame
import java.awt.*; // Container
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class IndepClassListener extends JFrame{
	
	public IndepClassListener() {
		setTitle("Action 이벤트 리스너 예제");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		Container c=getContentPane();
		c.setLayout(new FlowLayout());
		JButton btn=new JButton("Action");
		btn.addActionListener((ActionListener) new MyActionListener());
		c.add(btn);
		
		setSize(350,150);
		setVisible(true);
	}
	
	private class MyActionListener implements ActionListener{

		@Override
		public void actionPerformed(ActionEvent e) {
			// TODO Auto-generated method stub
			JButton b=(JButton)e.getSource();
			if(b.getText().equals("Action")) {
				b.setText("액션");
			}
			else {
				b.setText("Action");
			}
		}
		
	}
	
	public static void main(String [] args) {
		new IndepClassListener();
	}
}

 

익명 클래스로 Action 이벤트 리스너 만들기

import javax.swing.*; // JFrame
import java.awt.*; // Container
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class IndepClassListener extends JFrame{
	
	public IndepClassListener() {
		setTitle("Action 이벤트 리스너 예제");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		Container c=getContentPane();
		c.setLayout(new FlowLayout());
		JButton btn=new JButton("Action");
		btn.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				JButton b=(JButton)e.getSource();
				if(b.getText().equals("Action")) {
					b.setText("액션");
				}
				else {
					b.setText("Action");
				}
			}
		});
		c.add(btn);
		
		setSize(350,150);
		setVisible(true);
	}
	
	public static void main(String [] args) {
		new IndepClassListener();
	}
}