显式/以编程方式关闭JPanel

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JButton;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class CloseJPanelExample {
    public static void main(String[] args) {
        JFrame frame = new JFrame("Close JPanel Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        JPanel panel = new JPanel();
        JButton closeButton = new JButton("Close");
        
        closeButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                panel.setVisible(false); // 关闭JPanel
            }
        });
        
        panel.add(closeButton);
        frame.add(panel);
        
        frame.pack();
        frame.setVisible(true);
    }
}