具有隐藏和显示功能的 Java Swing 表单菜单

Question

我对 GUI 编程有点陌生，我一直在努力弄清楚如何实现如下所示的东西:

基本上我想要一些文本条目，侧面有一个箭头。单击箭头或文本时，其下方会出现一个表单。

如有任何建议，我们将不胜感激，先谢谢您。

Answer 1

从概念上讲，这只是使容器(如 JPanel)隐藏或显示，并让布局管理器完成其工作

import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

public class Test {

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

    public Test() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                    ex.printStackTrace();
                }

                JFrame frame = new JFrame("Testing");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.add(new TestPane());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

    public class TestPane extends JPanel {

        public TestPane() {
            setLayout(new GridBagLayout());
            GridBagConstraints gbc = new GridBagConstraints();

            JPanel panel = new JPanel(new GridBagLayout());
            panel.add(new JLabel("Pecka-boo"));

            JButton btn = new JButton("Show");
            btn.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    panel.setVisible(!panel.isVisible());
                    btn.setText(panel.isVisible() ? "Hide" : "Show");
                }
            });

            gbc.gridx = 0;
            gbc.gridy = 0;
            add(btn, gbc);

            gbc.gridy++;
            gbc.fill = GridBagConstraints.BOTH;
            gbc.weightx = 1;
            gbc.weighty = 1;
            add(panel, gbc);
            panel.setVisible(false);
        }

        @Override
        public Dimension getPreferredSize() {
            return new Dimension(200, 200);
        }

    }

}

看一下:

• Laying Out Components Within a Container
• How to Use Buttons, Check Boxes, and Radio Buttons
• How to Write an Action Listener

了解更多详细信息。

仅供引用:更复杂的 UI 会将子表单作为单独的类，这将减少(各个类的)复杂性并解耦代码