JDialog with WindowListener语言 - windowClosing未被触发

Question

我有一个扩展JDialog的类，它有一个窗口侦听器:

class MyClass extends JDialog {
     public MyClass() {
         setDefaultCloseOperation( JDialog.DO_NOTHING_ON_CLOSE );
         addWindowListener( new WindowAdapter() {
                @Override
                public void windowClosing(WindowEvent e) {
                    System.out.println("closing...");
                    //do something...
                }
            });
     }
}

当我点击X按钮时，什么也没发生。我也没看到"结束…"

我错过了什么?

Answer 1

适合我。

import java.awt.EventQueue;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JDialog;
class MyClass extends JDialog {
    public MyClass() {
        setDefaultCloseOperation(JDialog.DO_NOTHING_ON_CLOSE);
        addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.out.println("closing...");
                //do something...
            }
        });
    }
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                MyClass m = new MyClass();
                m.setVisible(true);
            }
        });
    }
}