++ Swing读书笔记事件处理
（本文来源于图老师网站，更多请访问https://m.tulaoshi.com/bianchengyuyan/）2－1：事件处理：
Source Event Event Listener
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AbstractButton ActionEvent ActionListener
(JButton,JtoggleButton, ChangeEvent ChangeListener
JCheckBox,JRadioButton ItemEvent ItemListener
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JTextField ActionEvent ActionListener
JpasswordField CaretEvent CaretListener
DocumentEvent DocumentListener
UndoableEvent UndoableListener
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JTextArea CaretEvent CaretListener
DocumentEvent DocumentListener
UndoableEvent UndoableListener
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JTextPane CaretEvent CaretListener
JEditorPane DocumentEvent DocumentListener
UndoableEvent UndoableListener
HyperlinkEvent HyperlinkListener
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JComboBox ActionEvent ActionListener
ItemEvent ItemListener
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JList ListSelectionEvent ListSelectionListener
ListDataEvent ListDataListener
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JFileChooser ActionEvent ActionListener
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JMenuItem ActionEvent ActionListener
ChangeEvent ChangeListener
ItemEvent ItemListener
MenuKeyEvent MenuKeyListener
MenuDragMouseEvent MenuDragMouseListener
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JMenu MenuEvent MenuListener
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JPopupMenu PopupMenuEvent PopupMenuListener
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JProgressBar ChangeEvent ChangeListener
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JSlider ChangeEvent ChangeListener
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JScrollBar AdjustmentEvent AdjustMentListener
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JTable ListSelectionEvent ListSelectionListener
TableModeEvent TableModeListener
TableColumnModelEvent TableColumnModeListener
CellEditorEvent CellEditorListener
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JTabbedPane ChangeEvent ChangeListener
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JTree TreeSelectionEvent TreeSelectionListener
TreeExpansionEvent TreeExpansionListener
TreeWillExpandEvent TreeWillExpandListener
TreeModeEvent TreeModeListener
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JTimer ActionEvent ActionListener
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底层事件：
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Event Listener
ComponentEvent ComponentListener
ContainerEvent ConatainerListener
FocusEvent FocusListener
KeyEvent KeyListener
MouseEvent MouseListener
MouseMotionEvent MouseMotionListener
WindowEvent WindowListener
ComponentEvent:主要处理组件大小的改变，位置的改变，或是可见与不可见状态(hidden or visible)等。
ContainerListener:主要在处理组件的加入或移出容器。
FocusListener:主要在处理焦点的取得或移开焦点等操作。
MouseListener:主要就是在处理鼠标是否在某个组件上，是否按下鼠标键，是否离开某个组件等操作，主要针对鼠标按键与位置
作处理。
MouseMotionListener:主要就是在追踪鼠标的位置，如(X,Y)坐标的位置，主人是针对鼠标坐标与拖曳操作作处理。
WindowListener:主要在处理窗口的所有操作。如处理active窗口或是de-active窗口，处理窗口的最大、最小化，处理窗口的关闭
、打开、退出等。
以上所述的每种EventListener都是一种interface,里面只有定义这个EventListener的interface,然后在这个类中，把要处理事
件的程序代码写在此interface的方法中。这是处理事件的标准操作，当然还有其他编写模式，如：利用inner class的匿名类方法
，就可以不用在class后面加上implements EventListener的表示法，或是利用Adapter类，就不用一一将interface中的每种方法都
实现。
让我们来了解一下，每一种EventListener的interface到底提供了哪几种方法要我们实现(Implement)!我们把事件区分成是由
Swing或是AWT所引发：
Swing EventListener Method
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CaretListener caretUpdate(CaretEvent e)
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CellEditorListener editingCanceled(ChangeEvent e)
editingStopped(ChangeEvent e)
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ChangeListener stateChanged(ChangeEvent e)
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DocumentListener changedUpdate(DocumentEvent e)
insertUpdate(DocumentEvent e)
removeUpdate(DocumentEvent e)
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HyperlinkListener hyperlinkUpdate(HyperlinkEvent e)
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ListDataListener contentsChanged(ListdataEvent e)
intervalAdded(ListDataEvent e)
intervalRemoved(ListDataEvent e)
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ListSelectionListener valueChanged(ListSelectionEvent e)
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MenuDragMouseListener menuDragMouseDragged(MenuDragMouseEvent e)
menuDragMouseEntered(menuDragMouseEvent e)
menuDragMouseExited(MenuDragMouseEvent e)
menuDragMouseReleased(MenuDragMouseEvent e)
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MenuKeyListener menuKeyPressed(MenuKeyEvent e)
menuKeyReleased(MenuKeyEvent e)
menuKeyTyped(MenuKeyEvent e)
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MenuListener menuCanceled(MenuEvent e)
menuDeselected(MenuEvent e)
menuSelected(MenuEvent e)
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PopupMenuListener popupMenuCanceled(PopupMenuEvent e)
popupMenuWillBecomeInvisible(PopupMenuEvent e)
popupMenuWillBecomeVisible(PopupMenuEvent e)
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TableColumnModelListener columnAdded(TableColumnModelEvent e)
columnMarginChanged(ChangeEvent e)
columnMoved(TableColumnModelEvent e)
columnRemoved(TableColumnModelEvent e)
columnSelectionChanged(ListSelectionEvent e)
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TableModelListener tableChanged(TableModelEvent e)
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TreeExpansionListener treeCollapsed(TreeExpansionEvent event)
treeExpanded(TreeExpansionEvent event)
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TreeModelListener treeNodesChanged(TreeModelEvent e)
treeNodesInserted(TreeModelEvent e)
treeNodesRemoved(TreeModelEvent e)
treeStructureChanged(TreeModelEvent e)
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TreeSelectionListener valueChanged(TreeSelectionEvent e)
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TreeWillExpandListener treeWillCollapse(TreeExpansionEvent event)
treeWillExpand(TreeExpansionEvent event)
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UndoableEditListener undoableEditHappened(UndoableEditEvent e)
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AWT EventListener Method
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ActionListener actionPerformed(ActionEvent e)
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AdjustmentListener adjustmentValueChanged(AdjustmentEvent e)
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ComponentListener componentHidden(ComponentEvent e)
componentMoved(ComponentEvent e)
componentResized(ComponentEvent e)
componentShown(ComponentEvent e)
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ContainerListener componentAdded(ContainerEvent e)
componentRemoved(ContainerEvent e)
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FocusListener focusGained(FocusEvent e)
focusLost(FocusEvent e)
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ItemListener itemStateChanged(ItemEvent e)
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KeyListener keyPressed(KeyEvent e)
keyReleased(KeyEvent e)
keyTyped(KeyEvent e)
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MouseListener mouseClicked(MouseEvent e)
mouseEntered(MouseEvent e)
mouseExited(MouseEvent e)
mousePressed(MouseEvent e)
mouseReleased(MouseEvent e)
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MouseMotionListener mouseDragged(MouseEvent e)
mouseMoved(MouseEvent e)
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WindowListener windowActivated(WindowEvent e)
windowClosed(WindowEvent e)
windowClosing(WindowEvent e)
windowDeactivated(WindowEvent e)
windowDeiconified(WindowEvent e)
windowIconified(WindowEvent e)
windowOpened(WindowEvent e)
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常用的Adapter类如下：
Adapter 对应的EventListener
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java.awt.event.ComponentAdapter ComponentListener
java.awt.event.ContainerAdapter ContainerListener
java.awt.event.FocusAdapter FocusListener
java.awt.event.KeyAdapter KeyListener
java.awt.event.MouseAdapter MouseListener
java.awt.event.MouseMotionAdapter MouseMotionListener
java.awt.event.WindowAdapter WindowListener
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在java中提供两个方法让你知道到底是哪个组件触发了事件，那就是getSource()与getActionCommane();getActionCommand()
（本文来源于图老师网站，更多请访问https://m.tulaoshi.com/bianchengyuyan/）方法是ActionEvent类所提供，而getSource()方法是EventObject类所提供，但ActionEvent类继承了EventObject类，因此这两个
方法ActionEvent都可以使用，看下面的例子就知道了：
EventDemo5.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class EventDemo5 extends WindowAdapter implements ActionListener
{
JButton b1 = null;
JButton b2 = null;
public EventDemo5()
{
JFrame f = new JFrame("EventDemo5");
Container contentPane = f.getContentPane();
contentPane.setLayout(new GridLayout(1,2));
b1 = new JButton("按我有声音喔");
b2 = new JButton("按我可开新窗口");
b1.addActionListener(this);
b2.addActionListener(this);
contentPane.add(b1);
contentPane.add(b2);
f.pack();
f.show();
f.addWindowListener(this);
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==b1)//getSource判断哪个按钮被按下了。
Toolkit.getDefaultToolkit().beep();
if(e.getSource()==b2)
{
JFrame newF = new JFrame("新窗口");
newF.setSize(200,200);
newF.show();
}
}
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
public static void main(String args[])
{
new EventDemo5();
}
}
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EventDemo6.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class EventDemo6 extends WindowAdapter implements ActionListener
{
JButton b1 = null;
JButton b2 = null;
public EventDemo6()
{
JFrame f = new JFrame("EventDemo6");
Container contentPane = f.getContentPane();
contentPane.setLayout(new GridLayout(1,2));
b1 = new JButton("按我有声音喔");
b2 = new JButton("按我可开新窗口");
b1.addActionListener(this);
b2.addActionListener(this);
contentPane.add(b1);
contentPane.add(b2);
f.pack();
f.show();
f.addWindowListener(this);
}
public void actionPerformed(ActionEvent e)
{
if((e.getActionCommand()).equals("按我有声音喔")) //getActionCommand()方法会返回按钮上的文字字符串。
Toolkit.getDefaultToolkit().beep();
if((e.getActionCommand()).equals("按我可开新窗口"))
{
JFrame newF = new JFrame("新窗口");
newF.setSize(200,200);
newF.show();
}
}
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
public static void main(String args[])
{
new EventDemo6();
}
}
