Eclipse吗？Netbeans没用过。只有一个EDT是什么意思？没有主进程？那你的那个每秒写个数字怎么做的？没有看到EDT的队列？如果是Eclipse的话，如果你是在 String result = JOptionPane.showInputDialog...这句这里设的断点，应该左边会有个加号，点开。
无语，有src自己看看不就好了吗？那文章是正确的这样看src，showInputDialog里面有这行，JDialog dialog = pane.createDialog(parentComponent, title, style);创建了一个JDialog，public class JDialog extends Dialog，所以去看public class Dialog extends Window，在showInputDialog里面调用了show(),那我们去看show(),下面是代码，public void show() { beforeFirstShow = false; if (!isModal()) { conditionalShow(null, null); } else { // Set this variable before calling conditionalShow(). That // way, if the Dialog is hidden right after being shown, we // won't mistakenly block this thread. keepBlocking = true; // Store the app context on which this dialog is being shown. // Event dispatch thread of this app context will be sleeping until // we wake it by any event from hideAndDisposeHandler(). showAppContext = AppContext.getAppContext(); AtomicLong time = new AtomicLong(); Component predictedFocusOwner = null; try { predictedFocusOwner = getMostRecentFocusOwner(); if (conditionalShow(predictedFocusOwner, time)) { // We have two mechanisms for blocking: 1. If we're on the // EventDispatchThread, start a new event pump. 2. If we're // on any other thread, call wait() on the treelock. modalFilter = ModalEventFilter.createFilterForDialog(this); final Runnable pumpEventsForFilter = new Runnable() { public void run() { EventDispatchThread dispatchThread = (EventDispatchThread)Thread.currentThread(); dispatchThread.pumpEventsForFilter(new Conditional() { public boolean evaluate() { return keepBlocking && windowClosingException == null; } }, modalFilter); } }; // if this dialog is toolkit-modal, the filter should be added // to all EDTs (for all AppContexts) if (modalityType == ModalityType.TOOLKIT_MODAL) { Iterator it = AppContext.getAppContexts().iterator(); while (it.hasNext()) { AppContext appContext = (AppContext)it.next(); if (appContext == showAppContext) { continue; } EventQueue eventQueue = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY); // it may occur that EDT for appContext hasn't been started yet, so // we post an empty invocation event to trigger EDT initialization Runnable createEDT = new Runnable() { public void run() {}; }; eventQueue.postEvent(new InvocationEvent(this, createEDT)); EventDispatchThread edt = eventQueue.getDispatchThread(); edt.addEventFilter(modalFilter); } } modalityPushed(); try { if (EventQueue.isDispatchThread()) { /* * dispose SequencedEvent we are dispatching on current * AppContext, to prevent us from hang. * */ // BugId 4531693 ([email protected]) SequencedEvent currentSequencedEvent = KeyboardFocusManager. getCurrentKeyboardFocusManager().getCurrentSequencedEvent(); if (currentSequencedEvent != null) { currentSequencedEvent.dispose(); } /* * Event processing is done inside doPrivileged block so that * it wouldn't matter even if user code is on the stack * Fix for BugId 6300270 */ AccessController.doPrivileged(new PrivilegedAction() { public Object run() { pumpEventsForFilter.run(); return null; } }); } else { synchronized (getTreeLock()) { Toolkit.getEventQueue().postEvent(new PeerEvent(this, pumpEventsForFilter, PeerEvent.PRIORITY_EVENT)); while (keepBlocking && windowClosingException == null) { try { getTreeLock().wait(); } catch (InterruptedException e) { break; } } } } } finally { modalityPopped(); } // if this dialog is toolkit-modal, its filter must be removed // from all EDTs (for all AppContexts) if (modalityType == ModalityType.TOOLKIT_MODAL) { Iterator it = AppContext.getAppContexts().iterator(); while (it.hasNext()) { AppContext appContext = (AppContext)it.next(); if (appContext == showAppContext) { continue; } EventQueue eventQueue = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY); EventDispatchThread edt = eventQueue.getDispatchThread(); edt.removeEventFilter(modalFilter); } } if (windowClosingException != null) { windowClosingException.fillInStackTrace(); throw windowClosingException; } } } finally { if (predictedFocusOwner != null) { // Restore normal key event dispatching KeyboardFocusManager.getCurrentKeyboardFocusManager(). dequeueKeyEvents(time.get(), predictedFocusOwner); } } } } 应该很容易看懂了吧？ 里面的pumpEventsForFilter，你一直跟着，就能看到这个boolean pumpOneEventForFilters(int id) { try { AWTEvent event; boolean eventOK; do { event = (id == ANY_EVENT) ? theQueue.getNextEvent() : theQueue.getNextEvent(id); eventOK = true; synchronized (eventFilters) { for (int i = eventFilters.size() - 1; i >= 0; i--) { EventFilter f = eventFilters.get(i); EventFilter.FilterAction accept = f.acceptEvent(event); if (accept == EventFilter.FilterAction.REJECT) { eventOK = false; break; } else if (accept == EventFilter.FilterAction.ACCEPT_IMMEDIATELY) { break; } } } eventOK = eventOK && SunDragSourceContextPeer.checkEvent(event); if (!eventOK) { event.consume(); } } while (eventOK == false);
if (dbg.on) { dbg.println("Dispatching: "+event); } theQueue.dispatchEvent(event); return true; } catch (ThreadDeath death) { return false; } catch (InterruptedException interruptedException) { return false; // AppContext.dispose() interrupts all // Threads in the AppContext } // Can get and throw only unchecked exceptions catch (RuntimeException e) { processException(e, modalFiltersCount > 0); } catch (Error e) { processException(e, modalFiltersCount > 0); } return true; }
让你看stack也不知道你都看到什么了。给你贴个stack的代码import java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener;import javax.swing.JButton; import javax.swing.JDialog; import javax.swing.JFrame; public class EDTStack extends JFrame { class DLG extends JDialog { DLG() { super(EDTStack.this,"Dialog",true); JButton btn = new JButton("Dump Stack"); btn.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { Thread.dumpStack(); }
}); this.getContentPane().add(btn,BorderLayout.CENTER); setBounds(200,140,400,300); } } EDTStack() { super("Frame"); JButton btn = new JButton("Show Dialog"); btn.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { new DLG().setVisible(true); }
}); this.getContentPane().add(btn,BorderLayout.CENTER); setBounds(0,0,800,600); } public static void main(String[] args) { new EDTStack().setVisible(true); }}输出结果： java.lang.Exception: Stack trace at java.lang.Thread.dumpStack(Thread.java:1206) at EDTStack$DLG$1.actionPerformed(EDTStack.java:22) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236) at java.awt.Component.processMouseEvent(Component.java:6263) at javax.swing.JComponent.processMouseEvent(JComponent.java:3267) at java.awt.Component.processEvent(Component.java:6028) at java.awt.Container.processEvent(Container.java:2041) at java.awt.Component.dispatchEventImpl(Component.java:4630) at java.awt.Container.dispatchEventImpl(Container.java:2099) at java.awt.Component.dispatchEvent(Component.java:4460) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168) at java.awt.Container.dispatchEventImpl(Container.java:2085) at java.awt.Window.dispatchEventImpl(Window.java:2475) at java.awt.Component.dispatchEvent(Component.java:4460) at java.awt.EventQueue.dispatchEvent(EventQueue.java:599) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:178) at java.awt.Dialog$1.run(Dialog.java:1045) at java.awt.Dialog$3.run(Dialog.java:1097) at java.security.AccessController.doPrivileged(Native Method) at java.awt.Dialog.show(Dialog.java:1095) at java.awt.Component.show(Component.java:1563) at java.awt.Component.setVisible(Component.java:1515) at java.awt.Window.setVisible(Window.java:841) at java.awt.Dialog.setVisible(Dialog.java:985) at EDTStack$1.actionPerformed(EDTStack.java:38) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236) at java.awt.Component.processMouseEvent(Component.java:6263) at javax.swing.JComponent.processMouseEvent(JComponent.java:3267) at java.awt.Component.processEvent(Component.java:6028) at java.awt.Container.processEvent(Container.java:2041) at java.awt.Component.dispatchEventImpl(Component.java:4630) at java.awt.Container.dispatchEventImpl(Container.java:2099) at java.awt.Component.dispatchEvent(Component.java:4460) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168) at java.awt.Container.dispatchEventImpl(Container.java:2085) at java.awt.Window.dispatchEventImpl(Window.java:2475) at java.awt.Component.dispatchEvent(Component.java:4460) at java.awt.EventQueue.dispatchEvent(EventQueue.java:599) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122) 有没有看到stack中有两段事件分派处理(dispatchEvent)？
实际情况不太好说清楚，你在调试环境下设个断点，看看java调用堆栈就知道是怎么回事儿了。
JDK下的src.zip就是最好的资料。
Event Dispatcher就是一直等着有Event就处理，处理完了就再等。
在你的Frame窗口上的某个EventListerner的代码里设个断点。
程序中断了才能看到调用堆栈啊。
http://java.sun.com/docs/books/tutorial
就是很好的入门教程。对于Java技术，SDN是一个比CSDN好很多的社区
String result = JOptionPane.showInputDialog...这句这里设的断点，应该左边会有个加号，点开。
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;public class SwingTest extends javax.swing.JFrame implements ActionListener {
private JPanel jPanel1;
private JButton jButton1;
private static JTextField jTextField1;
private JButton jButton2;
private JPanel jPanel3;
private JPanel jPanel2;
private static SwingTest inst;
private static int i; /**
* Auto-generated main method to display this JFrame
*/
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
inst = new SwingTest();
inst.setLocationRelativeTo(null);
inst.setVisible(true);
}
});
for (i = 0; i < 100; i++) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
SwingUtilities.invokeLater(new Runnable() {
public void run() {
jTextField1.setText(jTextField1.getText() + i + " ");
}
});
}
} public SwingTest() {
super();
initGUI();
} private void initGUI() {
try {
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
{
jPanel1 = new JPanel();
BorderLayout jPanel1Layout = new BorderLayout();
jPanel1.setLayout(jPanel1Layout);
getContentPane().add(jPanel1, BorderLayout.CENTER);
{
jPanel2 = new JPanel();
CardLayout jPanel2Layout = new CardLayout();
jPanel2.setLayout(jPanel2Layout);
jPanel1.add(jPanel2, BorderLayout.NORTH);
jPanel2.setPreferredSize(new java.awt.Dimension(392, 120));
{
jTextField1 = new JTextField();
jPanel2.add(jTextField1, "jTextField1");
jTextField1.setText("");
} }
{
jPanel3 = new JPanel();
jPanel1.add(jPanel3, BorderLayout.CENTER);
{
jButton1 = new JButton();
jButton1.setText("jButton1");
jPanel3.add(jButton1);
jButton1.addActionListener(this); }
}
}
pack();
} catch (Exception e) {
e.printStackTrace();
}
} @Override
public void actionPerformed(ActionEvent arg0) {
String result = JOptionPane.showInputDialog(this, "请输入联系人ID：", "添加联系人",
JOptionPane.INFORMATION_MESSAGE);
System.out.println(result);
System.out.println(result);
}
}
public void actionPerformed(ActionEvent arg0) {
Thread.sleep(50000);
String result = JOptionPane.showInputDialog(this, "请输入联系人ID：", "添加联系人",
JOptionPane.INFORMATION_MESSAGE);
System.out.println(result);
System.out.println(result);
}
关于你说看不到Event-Queue，肯定是你设置不对，你把断点放在String result= 这一句，然后点一下按钮，肯定能看到一堆Event-Queue的，你再看看另外，for (i = 0; i < 100; i++) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
SwingUtilities.invokeLater(new Runnable() {
public void run() {
jTextField1.setText(jTextField1.getText() + i + " ");
}
});
}你怎么能这样用呢？两个i不是同步的，打印在jTextField1肯定不会一直是从0到100。
好像也是一种猜测而已，不知是否正确http://daniel-wuz.javaeye.com/blog/135445
无语，有src自己看看不就好了吗？那文章是正确的这样看src，showInputDialog里面有这行，JDialog dialog = pane.createDialog(parentComponent, title, style);创建了一个JDialog，public class JDialog extends Dialog，所以去看public class Dialog extends Window，在showInputDialog里面调用了show(),那我们去看show(),下面是代码，public void show() {
beforeFirstShow = false;
if (!isModal()) {
conditionalShow(null, null);
} else {
// Set this variable before calling conditionalShow(). That
// way, if the Dialog is hidden right after being shown, we
// won't mistakenly block this thread.
keepBlocking = true; // Store the app context on which this dialog is being shown.
// Event dispatch thread of this app context will be sleeping until
// we wake it by any event from hideAndDisposeHandler().
showAppContext = AppContext.getAppContext(); AtomicLong time = new AtomicLong();
Component predictedFocusOwner = null;
try {
predictedFocusOwner = getMostRecentFocusOwner();
if (conditionalShow(predictedFocusOwner, time)) {
// We have two mechanisms for blocking: 1. If we're on the
// EventDispatchThread, start a new event pump. 2. If we're
// on any other thread, call wait() on the treelock. modalFilter = ModalEventFilter.createFilterForDialog(this); final Runnable pumpEventsForFilter = new Runnable() {
public void run() {
EventDispatchThread dispatchThread =
(EventDispatchThread)Thread.currentThread();
dispatchThread.pumpEventsForFilter(new Conditional() {
public boolean evaluate() {
return keepBlocking && windowClosingException == null;
}
}, modalFilter);
}
}; // if this dialog is toolkit-modal, the filter should be added
// to all EDTs (for all AppContexts)
if (modalityType == ModalityType.TOOLKIT_MODAL) {
Iterator it = AppContext.getAppContexts().iterator();
while (it.hasNext()) {
AppContext appContext = (AppContext)it.next();
if (appContext == showAppContext) {
continue;
}
EventQueue eventQueue = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
// it may occur that EDT for appContext hasn't been started yet, so
// we post an empty invocation event to trigger EDT initialization
Runnable createEDT = new Runnable() {
public void run() {};
};
eventQueue.postEvent(new InvocationEvent(this, createEDT));
EventDispatchThread edt = eventQueue.getDispatchThread();
edt.addEventFilter(modalFilter);
}
} modalityPushed();
try {
if (EventQueue.isDispatchThread()) {
/*
* dispose SequencedEvent we are dispatching on current
* AppContext, to prevent us from hang.
*
*/
// BugId 4531693 ([email protected])
SequencedEvent currentSequencedEvent = KeyboardFocusManager.
getCurrentKeyboardFocusManager().getCurrentSequencedEvent();
if (currentSequencedEvent != null) {
currentSequencedEvent.dispose();
} /*
* Event processing is done inside doPrivileged block so that
* it wouldn't matter even if user code is on the stack
* Fix for BugId 6300270
*/ AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
pumpEventsForFilter.run();
return null;
}
});
} else {
synchronized (getTreeLock()) {
Toolkit.getEventQueue().postEvent(new PeerEvent(this,
pumpEventsForFilter,
PeerEvent.PRIORITY_EVENT));
while (keepBlocking && windowClosingException == null) {
try {
getTreeLock().wait();
} catch (InterruptedException e) {
break;
}
}
}
}
} finally {
modalityPopped();
} // if this dialog is toolkit-modal, its filter must be removed
// from all EDTs (for all AppContexts)
if (modalityType == ModalityType.TOOLKIT_MODAL) {
Iterator it = AppContext.getAppContexts().iterator();
while (it.hasNext()) {
AppContext appContext = (AppContext)it.next();
if (appContext == showAppContext) {
continue;
}
EventQueue eventQueue = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
EventDispatchThread edt = eventQueue.getDispatchThread();
edt.removeEventFilter(modalFilter);
}
} if (windowClosingException != null) {
windowClosingException.fillInStackTrace();
throw windowClosingException;
}
}
} finally {
if (predictedFocusOwner != null) {
// Restore normal key event dispatching
KeyboardFocusManager.getCurrentKeyboardFocusManager().
dequeueKeyEvents(time.get(), predictedFocusOwner);
}
}
}
}
应该很容易看懂了吧？
里面的pumpEventsForFilter，你一直跟着，就能看到这个boolean pumpOneEventForFilters(int id) {
try {
AWTEvent event;
boolean eventOK;
do {
event = (id == ANY_EVENT)
? theQueue.getNextEvent()
: theQueue.getNextEvent(id); eventOK = true;
synchronized (eventFilters) {
for (int i = eventFilters.size() - 1; i >= 0; i--) {
EventFilter f = eventFilters.get(i);
EventFilter.FilterAction accept = f.acceptEvent(event);
if (accept == EventFilter.FilterAction.REJECT) {
eventOK = false;
break;
} else if (accept == EventFilter.FilterAction.ACCEPT_IMMEDIATELY) {
break;
}
}
}
eventOK = eventOK && SunDragSourceContextPeer.checkEvent(event);
if (!eventOK) {
event.consume();
}
}
while (eventOK == false);
if (dbg.on) {
dbg.println("Dispatching: "+event);
} theQueue.dispatchEvent(event);
return true;
}
catch (ThreadDeath death) {
return false; }
catch (InterruptedException interruptedException) {
return false; // AppContext.dispose() interrupts all
// Threads in the AppContext }
// Can get and throw only unchecked exceptions
catch (RuntimeException e) {
processException(e, modalFiltersCount > 0);
} catch (Error e) {
processException(e, modalFiltersCount > 0);
}
return true;
}
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
public class EDTStack extends JFrame
{
class DLG extends JDialog
{
DLG()
{
super(EDTStack.this,"Dialog",true);
JButton btn = new JButton("Dump Stack");
btn.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
Thread.dumpStack();
}
});
this.getContentPane().add(btn,BorderLayout.CENTER);
setBounds(200,140,400,300);
}
}
EDTStack()
{
super("Frame");
JButton btn = new JButton("Show Dialog");
btn.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
new DLG().setVisible(true);
}
});
this.getContentPane().add(btn,BorderLayout.CENTER);
setBounds(0,0,800,600);
}
public static void main(String[] args)
{
new EDTStack().setVisible(true);
}}输出结果：
java.lang.Exception: Stack trace
at java.lang.Thread.dumpStack(Thread.java:1206)
at EDTStack$DLG$1.actionPerformed(EDTStack.java:22)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.Component.processMouseEvent(Component.java:6263)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6028)
at java.awt.Container.processEvent(Container.java:2041)
at java.awt.Component.dispatchEventImpl(Component.java:4630)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
at java.awt.Container.dispatchEventImpl(Container.java:2085)
at java.awt.Window.dispatchEventImpl(Window.java:2475)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:178)
at java.awt.Dialog$1.run(Dialog.java:1045)
at java.awt.Dialog$3.run(Dialog.java:1097)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.Dialog.show(Dialog.java:1095)
at java.awt.Component.show(Component.java:1563)
at java.awt.Component.setVisible(Component.java:1515)
at java.awt.Window.setVisible(Window.java:841)
at java.awt.Dialog.setVisible(Dialog.java:985)
at EDTStack$1.actionPerformed(EDTStack.java:38)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.Component.processMouseEvent(Component.java:6263)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6028)
at java.awt.Container.processEvent(Container.java:2041)
at java.awt.Component.dispatchEventImpl(Component.java:4630)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
at java.awt.Container.dispatchEventImpl(Container.java:2085)
at java.awt.Window.dispatchEventImpl(Window.java:2475)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
有没有看到stack中有两段事件分派处理(dispatchEvent)？