您总是可以通过获取其持有的任何组件的WindowAncestor来获得对JOptionPane的引用，然后调用
dispose()或
setVisible(false)返回Window。该窗口可以通过使用获得
SwingUtilities.getWindowAncestor(component)
例如：
import java.awt.Window;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.*;public class CloseOptionPane { @SuppressWarnings("serial") private static void createAndShowGui() { final JLabel label = new JLabel(); int timerDelay = 1000; new Timer(timerDelay , new ActionListener() { int timeLeft = 5; @Override public void actionPerformed(ActionEvent e) { if (timeLeft > 0) { label.setText("Closing in " + timeLeft + " seconds"); timeLeft--; } else { ((Timer)e.getSource()).stop(); Window win = SwingUtilities.getWindowAncestor(label); win.setVisible(false); } } }){{setInitialDelay(0);}}.start(); JOptionPane.showMessageDialog(null, label); } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { public void run() { createAndShowGui(); } }); }}
