只是对我拥有的一些重复代码进行思考：
Runnable run = new Runnable() {
@Override
public void run() {
// Some EDT code
}
};
if (!EventQueue.isDispatchThread()) {
SwingUtilities.invokeAndWait(run);
} else {
run.run();
}
这不是很烦人，但似乎有一些专有功能可以为你检查这个，虽然我还没有找到它。
似乎会有一些专有功能可以为您检查
没有。
不包括我从不需要使用invokeAndWait或测试的物质外观和感觉isDispatchThread / isEventDispatchThread，
在某些特殊情况下需要使用物质外观和感觉invokeAndWaitfor JTable, JTree, SwingX's TreeTable, 在这种情况下真的不重要
“EDT 到期”需要延迟 30 秒，然后您可以创建 n_Threads，然后每个线程都可以存活 EDT，简单，无需特别努力，另一个限制可能是来自 Native OS 的延迟
输出
run:
Time at : 00:00:45
There isn't Live EventQueue.isDispatchThread, why any reason for that
There isn't Live SwingUtilities.isEventDispatchThread, why any reason for that
Time at : 00:00:45
EventQueue.isDispatchThread
SwingUtilities.isEventDispatchThread
Time at : 00:00:45
EventQueue.isDispatchThread
SwingUtilities.isEventDispatchThread
Time at : 00:01:15
There isn't Live EventQueue.isDispatchThread, why any reason for that
There isn't Live SwingUtilities.isEventDispatchThread, why any reason for that
Push a new event to EDT
Time at : 00:01:45
EventQueue.isDispatchThread
SwingUtilities.isEventDispatchThread
Time at : 00:02:15
There isn't Live EventQueue.isDispatchThread, why any reason for that
There isn't Live SwingUtilities.isEventDispatchThread, why any reason for that
Time at : 00:02:45
There isn't Live EventQueue.isDispatchThread, why any reason for that
There isn't Live SwingUtilities.isEventDispatchThread, why any reason for that
Push a new event to EDT
Time at : 00:03:15
EventQueue.isDispatchThread
SwingUtilities.isEventDispatchThread
Time at : 00:03:45
There isn't Live EventQueue.isDispatchThread, why any reason for that
There isn't Live SwingUtilities.isEventDispatchThread, why any reason for that
Time at : 00:04:15
There isn't Live EventQueue.isDispatchThread, why any reason for that
There isn't Live SwingUtilities.isEventDispatchThread, why any reason for that
Push a new event to EDT
Time at : 00:04:45
EventQueue.isDispatchThread
SwingUtilities.isEventDispatchThread
Terminating this madness
BUILD SUCCESSFUL (total time: 4 minutes 31 seconds)
从
import java.awt.EventQueue;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.concurrent.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.*;
public class IsThereEDT {
private ScheduledExecutorService scheduler;
private AccurateScheduledRunnable periodic;
private ScheduledFuture<?> periodicMonitor;
private int taskPeriod = 30;
private SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
private Date dateRun;
private JFrame frame1 = new JFrame("Frame 1");
public IsThereEDT() {
scheduler = Executors.newSingleThreadScheduledExecutor();
periodic = new AccurateScheduledRunnable() {
private final int ALLOWED_TARDINESS = 200;
private int countRun = 0;
private int countCalled = 0;
private int maxCalled = 10;
@Override
public void run() {
countCalled++;
if (countCalled < maxCalled) {
if (countCalled % 3 == 0) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
System.out.println("Push a new event to EDT");
frame1.repaint();
isThereReallyEDT();
}
});
} else {
if (this.getExecutionTime() < ALLOWED_TARDINESS) {
countRun++;
isThereReallyEDT(); // non on EDT
}
}
} else {
System.out.println("Terminating this madness");
System.exit(0);
}
}
};
periodicMonitor = scheduler.scheduleAtFixedRate(periodic, 0, taskPeriod, TimeUnit.SECONDS);
periodic.setThreadMonitor(periodicMonitor);
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
isThereReallyEDT();
frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame1.getContentPane().add(new JLabel("Hello in frame 1"));
frame1.pack();
frame1.setLocation(100, 100);
frame1.setVisible(true);
}
});
try {
Thread.sleep(500);
} catch (InterruptedException ex) {
Logger.getLogger(IsThereEDT.class.getName()).log(Level.SEVERE, null, ex);
}
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
JFrame frame2 = new JFrame("Frame 2");
frame2.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame2.getContentPane().add(new JLabel("Hello in frame 2"));
frame2.pack();
frame2.setLocation(200, 200);
frame2.setVisible(true);
isThereReallyEDT();
}
});
}
private void isThereReallyEDT() {
dateRun = new java.util.Date();
System.out.println(" Time at : " + sdf.format(dateRun));
if (EventQueue.isDispatchThread()) {
System.out.println("EventQueue.isDispatchThread");
} else {
System.out.println("There isn't Live EventQueue.isDispatchThread, why any reason for that ");
}
if (SwingUtilities.isEventDispatchThread()) {
System.out.println("SwingUtilities.isEventDispatchThread");
} else {
System.out.println("There isn't Live SwingUtilities.isEventDispatchThread, why any reason for that ");
}
System.out.println();
}
public static void main(String[] args) {
IsThereEDT isdt = new IsThereEDT();
}
}
abstract class AccurateScheduledRunnable implements Runnable {
private ScheduledFuture<?> thisThreadsMonitor;
public void setThreadMonitor(ScheduledFuture<?> monitor) {
this.thisThreadsMonitor = monitor;
}
protected long getExecutionTime() {
long delay = -1 * thisThreadsMonitor.getDelay(TimeUnit.MILLISECONDS);
return delay;
}
}
你可以做任何事情，改变订单，方法，冻结Thread.sleep(int)，在所有情况下都有可能在假定的时刻活着 EDT，没有任何阴影，任何奇迹，错误的代码调用天堂而不是 EDT
考虑使用
http://docs.oracle.com/javase/7/docs/api/javax/swing/SwingWorker.html
或者
http://docs.oracle.com/javase/7/docs/api/javax/swing/Timer.html
反而。