자바

* 이벤트 객체

java.util.EventObject

.getSource()

java.awt.AWTEvent -> java.util.EventObject

java.awt.event.KeyEvent -> java.awt.event.InputEvent -> java.awt.event.ComponentEvent -> java.awt.AWTEvent

.VK_UP

.VK_DOWN

.VK_LEFT

.VK_RIGHT

.VK_ENTER

.getKeyChar()

.getKeyCode()

java.awt.event.KeyEvent.VK_UP

java.awt.event.MouseEvent -> java.awt.event.InputEvent -> java.awt.event.ComponentEvent -> java.awt.AWTEvent

.getX()

.getY()

java.awt.event.ActionEvent -> java.awt.AWTEvent

java.awt.Button

java.awt.MenuItem

.getActionCommand()

java.awt.event.TextEvent -> java.awt.AWTEvent

java.awt.event.ItemEvent -> java.awt.AWTEvent

.SELECTED

java.awt.Checkbox

java.awt.Choice

java.awt.List

.getStateChange()

java.awt.event.ItemEvent.SELECTED

.getItem()

c.f. java.awt.List::addItem()

java.awt.event.AdjustmentEvent -> java.awt.AWTEvent

.getAdjustmentType()

.getValue()

* 이벤트 리스너

java.awt.event.ActionListener // interface

void actionPerformed(ActionEvent e) // callback

java.awt.event.ItemListener // interface

void itemStateChanged(ItemEvent e)

java.awt.event.AdjustmentListener // interface

void adjustmentValueChanged(AdjustmentEvent e)

java.awt.event.KeyListener // interface

void keyTyped(KeyEvent e)

void keyPressed(KeyEvent e)

void keyReleased(KeyEvent e)

java.awt.event.KeyAdapter

void keyTyped(KeyEvent)

java.awt.event.TextListener // interface

void textValueChanged(TextEvent e)

java.awt.event.MouseListener // interface

void mouseEntered(MouseEvent e)

void mouseExited(MouseEvent e)

void mouseClicked(MouseEvent e)

void mousePressed(MouseEvent e)

void mouseReleased(MouseEvent e)

java.awt.event.MouseMotionListener // interface

void mouseDragged(MouseEvent e)

void mouseMoved(MouseEvent e)

*

java.awt.Component -> java.lang.Object

.addKeyListener()

java.awt.event.KeyListener // interface

.addMouseListener()

java.awt.event.MouseListener // interface

.addMouseMotionListener()

java.awt.event.MouseMotionListener // interface

.setBackground()

java.awt.Color.red

.getBackground()

.getGraphics()

.setSize()

.requestFocus()

java.awt.Container -> java.awt.Component

.add()

java.awt.Window -> java.awt.Container

java.awt.Frame -> java.awt.Window

.setMenuBar()

java.awt.Panel -> java.awt.Container

java.awt.MenuItem -> java.awt.MenuComponent

.addActionListener(java.awt.event.ActionListener)

java.awt.Menu -> java.awt.MenuItem

.add()

java.awt.MenuBar -> java.awt.MenuComponent

.add()

java.awt.Label -> java.awt.Component

.CENTER

.setText()

java.awt.Canvas -> java.awt.Component

java.awt.Button -> java.awt.Component

.addActionListener()

java.awt.event.ActionListener // interface

java.awt.CheckboxGroup

java.awt.Checkbox

.addItemListener(java.awt.event.ItemListener)

java.awt.TextComponent -> java.awt.Component

.addTextListener()

java.awt.event.TextListener // interface

.getText()

java.awt.TextField -> java.awt.TextComponent

.setEchoChar()

.setText()

java.awt.TextArea -> java.awt.TextComponent

.append()

.appendText() // Deprecated

java.awt.Choice

.addItem()

java.awt.List

.addItem()

.getSelectedItem()

.getSelectedItems()

java.awt.Scrollbar -> java.awt.Component

.HORIZONTAL

.addAdjustmentListener()

java.awt.event.AdjustmentListener // interface

import java.awt.*;
import java.awt.event.*;

public class ComTest02{

// <

class FrameEvent102 extends Frame implements ActionListener {  
  ..
  public void actionPerformed(ActionEvent e){
    ..
  }

  public FrameEvent102( ) {
    Button      btnAppend;
      
    setLayout(new BorderLayout( )); 
    ..
    btnAppend = new Button(".." );
    ..
    this.add(btnAppend, BorderLayout.SOUTH);
    
    addWindowListener(new WindowAdapter( ){
      public void windowClosing(WindowEvent e) {
        dispose();     
        System.exit(0); 
      }
    }); 
    
    btnAppend.addActionListener(this);           
    
    setSize(400,300); 
    setVisible(true);  
    
  }  
}

// >
  public static void main(String[] args) {
    new FrameEvent102( );  
  }
}

java.applet.Applet -> java.awt.Panel

.getDocumentBase()

.getImage()

<APPLET code="Scribble.class" width=500 height=300></APPLET>

import java.applet.*;

import java.awt.*;

public class Scribble extends Applet {

  private int lastx, lasty;

  Button erase_button;

  Graphics g;

  public void init() {

    erase_button = new Button("Erase");

    this.add(erase_button);

    g = this.getGraphics();

    this.requestFocus();

  }

  public boolean mouseDown(Event e, int x, int y) {

    lastx = x;

    lasty = y;

    return true;

  }

  public boolean mouseDrag(Event e, int x, int y) {

    g.setColor(Color.black);

    g.drawLine(lastx, lasty, x, y);

    lastx = x;

    lasty = y;

    return true;

  }

  public boolean keyDown(Event e, int key) {

    if ((e.id == Event.KEY_PRESS) && (key == 'e')) {

      g.setColor(this.getBackground());   

      g.fillRect(0, 0, bounds().width, bounds().height);

      return true;

    } else {

      return false;

    }

  }

  public boolean action(Event e, Object arg) {

    if (e.target == erase_button) {

      g.setColor(this.getBackground());   

      g.fillRect(0, 0, bounds().width, bounds().height);

      return true;

    } else {

      return false;

    }

  }

}