The AWT Event Model

1. 이벤트 핸들러

 1) 이벤트 소스 ex)버튼 

 2) 이벤트 ex)ActionEvent

 3) 이벤트 리스너 ex) addActionListener()

 4) 이벤트 핸들러  ex) actionPerformed(ActionEvent e)

2. ex) 혼자서 생성과 리스너 모두 실행하는 경우

import java.awt.Color; import java.awt.FlowLayout; import java.awt.Font; import java.awt.Frame; import java.awt.Button; import java.awt.event.*;  //1. 패키지 임포트하자. //2. 리스너 implements 하자. public class EventModel3 implements WindowListener,ActionListener{  private Frame f ;  private Button btn ;  private Font font;  private void go(){   f= new Frame("Event Model1");   //4. 이벤트 소스에 이벤트 리스너등록하자.   f.addWindowListener(this); //자신이 리스너가 된다.   f.setLayout(new FlowLayout());   font = new Font("Serif",Font.BOLD,30);   btn = new Button("빨간색");   btn.setFont(font);   btn.addActionListener(this);   btn.setBackground(Color.red);   f.add(btn);    f.setSize(500, 400);   f.setVisible(true);  }  //3. 이벤트 핸들러 메소드 오버라이드하자.  public void windowClosing(WindowEvent e){ //종료 이벤트   System.exit(0);  }   public void actionPerformed(ActionEvent e){   String str = e.getActionCommand();   if (str.equals("빨간색")){    f.setBackground(Color.red);    btn.setLabel("파란색");    btn.setBackground(Color.blue);    btn.setForeground(Color.red);    System.out.println( e.getActionCommand());   }else{    f.setBackground(Color.blue);    btn.setLabel("빨간색");    btn.setBackground(Color.red);    btn.setForeground(Color.blue);    System.out.println( e.getActionCommand());   }     }    public void windowClosed (WindowEvent e){}  public void windowOpened(WindowEvent e){}  public void windowActivated(WindowEvent e){}  public void windowDeactivated(WindowEvent e){}  public void windowIconified(WindowEvent e){}  public void windowDeiconified(WindowEvent e){}   public static void main(String[] args) {   new EventModel3().go();  } }

 

2. 이벤트 종류. (자바는 이벤트 종류가 많지않다.)

Action	ActionListener	actionPerformed(ActionEvent ActionEvent)
Item	ItemListener	itemStateChanged(ItemEvent ItemEvent)
Mouse	MouseListener	mousePressed(MouseEvent MouseEvent) mouseReleased(MouseEvent MouseEvent) mouseEntered(MouseEvent MouseEvent) mouseExited(MouseEvent MouseEvent) mouseClicked(MouseEvent MouseEvent)
MouseMotion	MouseMotionLi stener	mouseDragged(MouseEvent MouseEvent)  mouseMoved(MouseEvent MouseEvent)
Key	KeyListener	keyPressed(KeyEvent KeyEvent)  keyReleased(KeyEvent KeyEvent)  keyTyped(KeyEvent KeyEvent)
Focus	FocusListener	focusGained(FocusEvent FocusEvent)  focusLost(FocusEvent FocusEvent)
Adjustment	AdjustmentListener	adjustmentValueChanged(Adjustment AdjustmentEvent Event)
Component	ComponnetListener	componentMoved(ComponentEvent ComponentEvent)  componentHidden(ComponentEventcomponentHidden(ComponentEvent)  componentResized(ComponentEventcomponentResized(ComponentEvent)  componentShown(ComponentEvent ComponentEvent)
Window	WindowListener	windowClosing(WindowEvent WindowEvent)   windowOpened(WindowEvent WindowEvent)  windowIconified(WindowEvent WindowEvent)  windowDeiconfied(WindowEvent WindowEvent)  windowClosed(WindowEvent WindowEvent)  windowActivated(WindowEvent WindowEvent)  windowDeactivated(WindowEvent WindowEvent)
Container	ContainerListener	componentAdded(ContainerEvent ContainerEvent)  componentRemoved(ContainerEvent ContainerEvent)
Text	TextListener	textValueChanged(TextEvent TextEvent)

 

3. Adapter

 1) 이벤트 Listener들을 이미 상속받은 클래스로 필요한 메소드만 재정의 하여 쓸 수 있게된다. (코드 간소화)