有没有办法删除 JOptionPane 中按钮上的焦点？

Question

有没有办法移除 JOptionPanel 中按钮上的焦点？我真的很想删除它。我看起来很碍眼。 JOptionPanel

有我的代码

JOptionPane.showMessageDialog(
                null,
                mainPanel,
                "CREDITS   (づ￣ ³￣)づ ",
                JOptionPane.PLAIN_MESSAGE);

Answer 1

在这种情况下，您可能需要一个全局事件侦听器，以便在消息对话框出现时清除焦点。这是一个例子：

import java.awt.AWTEvent;
import java.awt.Toolkit;
import java.awt.event.AWTEventListener;
import java.awt.event.FocusEvent;

import javax.swing.FocusManager;
import javax.swing.JOptionPane;
import javax.swing.SwingUtilities;

public class TestFocus {

    private final AWTEventListener focusListener = this::removeFocus;
    
    public static void main(String[] args) {
        SwingUtilities.invokeLater(new TestFocus()::initUI);
    }
    
    private void initUI() {
        Toolkit.getDefaultToolkit().addAWTEventListener(focusListener, AWTEvent.FOCUS_EVENT_MASK);
        JOptionPane.showMessageDialog(null, "Here is no Focus on button", "No focus!", JOptionPane.PLAIN_MESSAGE);
        Toolkit.getDefaultToolkit().removeAWTEventListener(focusListener); // to be safe remove it twice.
    }
    
    private void removeFocus(AWTEvent e) {
        if (e instanceof FocusEvent && ((FocusEvent) e).getID() == FocusEvent.FOCUS_GAINED) {
            Toolkit.getDefaultToolkit().removeAWTEventListener(focusListener);
            FocusManager.getCurrentKeyboardFocusManager().clearFocusOwner();
        }
    }
}

有没有办法删除 JOptionPane 中按钮上的焦点？

Is there a way to remove that focus on the button in a JOptionPanel?

java

swing

jbutton