java - 无法按链顺序正确关闭 JOptionPane

Question

我正在显示一个JOptionPane，假设从JFrame单击按钮A，并再次显示另一个JOptionPane，假设从JOptionPane A单击按钮B，并且我在JOptionPane B上有一个按钮，在按钮1的单击事件上，我正在使用代码 JOptionPane.getRootFrame().dispose() 来关闭 JOptionPane B，但它同时关闭了 A 和 B，请帮助我如何只关闭 B 但不是 A。

这是我的示例代码我希望第二个 JOptionPane 必须打开

import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;

public class SampleCode extends JFrame {

public SampleCode() {
    setSize(new Dimension(500, 500));
    setLocation(450, 150);
    but1 = new JButton("Click me");
    add(but1);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    setVisible(true);

    but1.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            but1Function();

        }
    });
}

public static void main(String args[]) {
    new SampleCode();
}

void but1Function() {
    JPanel panel1 = new JPanel();
    JButton but2 = new JButton("Open new dialog");
    panel1.add(but2);

    but2.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            JPanel pan2 = new JPanel();
            JButton but3 = new JButton("click me to close");
            pan2.add(but3);
            but3.addActionListener(new ActionListener() {

                @Override
                public void actionPerformed(ActionEvent e) {
                    JOptionPane.getRootFrame().dispose();

                }
            });

            JOptionPane.showMessageDialog(null, pan2);

        }
    });

    JOptionPane jp = new JOptionPane(panel1, JOptionPane.CLOSED_OPTION,
            JOptionPane.DEFAULT_OPTION, null, new Object[] {}, null);

    JDialog dialog = jp.createDialog(null, "This one must be remain open");
    dialog.setLocation(500, 200);
    dialog.setSize(new Dimension(345, 200));
    dialog.setVisible(true);
}

JButton but1;

}

Answer 1

您不想获取根框架也不想处置它。您想要获取显示 JOptionPane 的窗口，该窗口应该是模态 JDialog。因此，如果您想以编程方式处置 JOPtionPane，请使用 SwingUtilities.getWindowAncestor(someComponentInJOptionPane)，并在该窗口上调用 dispose()。

import java.awt.Component;
import java.awt.Window;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;

import javax.swing.AbstractAction;
import javax.swing.JButton;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;


public class OptionPaneFun {
   public static void main(String[] args) {
      SwingUtilities.invokeLater(new Runnable() {
         @SuppressWarnings("serial")
         public void run() {
            final JPanel panel1 = new JPanel();
            panel1.add(new JButton(new AbstractAction("Show new option pane") {
               {
                  putValue(MNEMONIC_KEY, KeyEvent.VK_S);
               }
               @Override
               public void actionPerformed(ActionEvent e1) {
                  final JPanel panel2= new JPanel();
                  panel2.add(new JButton(new AbstractAction("Dispose of this option pane") {
                     {
                        putValue(MNEMONIC_KEY, KeyEvent.VK_D);
                     }
                     @Override
                     public void actionPerformed(ActionEvent e2) {
                        Component comp = (Component) e2.getSource();
                        Window win = SwingUtilities.getWindowAncestor(comp);
                        if (win != null) {
                           win.dispose();
                        }
                     }
                  }));
                  JOptionPane.showMessageDialog(panel1, panel2);

               }
            }));
            JOptionPane.showMessageDialog(null, panel1);
         }
      });

   }
}