java 如何以编程方式关闭消息对话框？
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How to close message dialog programmatically?
提问by andrew
I have a question about joptionpane.
我有一个关于 joptionpane 的问题。
Using JOptionPane.showMessageDialog(...), we can create a message dialog. But how to close it programmatically?
使用 JOptionPane.showMessageDialog(...)，我们可以创建一个消息对话框。但是如何以编程方式关闭它？
回答by Hovercraft Full Of Eels
You could always get a reference to the JOptionPane by getting the WindowAncestor of any component it's holding, and then call dispose()or setVisible(false)on the Window returned. The Window can be obtained by using SwingUtilities.getWindowAncestor(component)
您始终可以通过获取 JOptionPane 所持有的任何组件的 WindowAncestor 来获取对 JOptionPane 的引用，然后在返回的 Window 上调用dispose()或setVisible(false)。窗口可以通过使用获得SwingUtilities.getWindowAncestor(component)
For example:
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();
}
});
}
}
