Java Swing中有关事件机制

java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new MainJFrame().setVisible(true);
}
});

javax.swing.SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new MainJFrame().setVisible(true);
}
});

public static void invokeLater(Runnable doRun) {
EventQueue.invokeLater(doRun);
}

Open Declaration void javax.swing.SwingUtilities.invokeLater(Runnable doRun)

Causes doRun.run() to be executed asynchronously on the AWT event dispatching thread(就是EDT). This will happen after all pending AWT events have been processed. This method should be used when an application thread needs to update the GUI. In the following example the invokeLater call queues the Runnable object doHelloWorld on the event dispatching thread and then prints a message.

Runnable doHelloWorld = new Runnable() {
　　public void run() {
　　　　System.out.println("Hello World on " + Thread.currentThread());
　　}
};

SwingUtilities.invokeLater(doHelloWorld);
System.out.println("This might well be displayed before the other message.");

If invokeLater is called from the event dispatching thread -- for example, from a JButton's ActionListener -- the doRun.run() will still be deferred until all pending events have been processed. Note that if the doRun.run() throws an uncaught exception the event dispatching thread will unwind (not the current thread).
Additional documentation and examples for this method can be found in Concurrency in Swing.

As of 1.3 this method is just a cover for java.awt.EventQueue.invokeLater().

Unlike the rest of Swing, this method can be invoked from any thread.
Parameters:doRun See Also:invokeAndWait