[자바프로그래밍] 이벤트 처리

ActionEventTest3.java

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

public class MyFrame extends JFrame implements ActionListener {
   private JButton button1;
   private JButton button2;
   private JButton button3;
   private JLabel label;
   private JTextField text;
   
   MyFrame() {
      Toolkit kit = Toolkit.getDefaultToolkit();
      Dimension screensize = kit.getScreenSize();
      setSize(400, 200);
      setLocation(screensize.width / 2, screensize.height / 2);
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      setTitle("MyFrame");
      
      Image img = kit.getImage("icon.jpg");
      setIconImage(img);
      setLayout( new FlowLayout() );
      button1 = new JButton("버튼1");
      button2 = new JButton("버튼2");
      button3 = new JButton("버튼3");
      label = new JLabel("눌려진 버튼이 출력됩니다.");
      text = new JTextField(20); // 20칸
      button1.addActionListener(this);
      button2.addActionListener(this);
      button3.addActionListener(this);
      
      this.add(button1);
      this.add(button2);
      this.add(button3);
      this.add(label);
      this.add(text);
      setVisible(true);
   }
   
   public void actionPerformed(ActionEvent e) {
      if(e.getSource() == button1) {
         label.setText("Button - 1 is pressed");
         text.setText("Button - 1 is pressed");
         text.setEditable(false);
      } else if(e.getSource() == button2) {
         label.setText("Button - 2 is pressed");
         text.setText("Button - 2 is pressed");
         text.setEditable(true);
      } else {
         label.setText("Button - 3 is pressed");
         text.setText("Button - 3 is pressed");
      }
   }
}

 

Key 이벤트

KeyListener 인터페이스 구현

메소드

 

키 이벤트 예제