java自定义右键菜单

Java中可以通过使用Swing或JavaFX来自定义右键菜单。以下是一种常见的方法：

1. 使用Swing：

import javax.swing.*;
import java.awt.event.*;

public class CustomPopupMenu extends JFrame {
    private JPopupMenu popupMenu;

    public CustomPopupMenu() {
        setTitle("Custom Popup Menu");
        setSize(300, 200);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // 创建右键菜单
        popupMenu = new JPopupMenu();
        JMenuItem menuItem1 = new JMenuItem("菜单项1");
        JMenuItem menuItem2 = new JMenuItem("菜单项2");
        JMenuItem menuItem3 = new JMenuItem("菜单项3");

        // 添加菜单项的点击事件处理
        menuItem1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                JOptionPane.showMessageDialog(null, "点击了菜单项1");
            }
        });

        menuItem2.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                JOptionPane.showMessageDialog(null, "点击了菜单项2");
            }
        });

        menuItem3.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                JOptionPane.showMessageDialog(null, "点击了菜单项3");
            }
        });

        popupMenu.add(menuItem1);
        popupMenu.add(menuItem2);
        popupMenu.add(menuItem3);

        // 将右键菜单添加到组件上
        addMouseListener(new MouseAdapter() {
            public void mouseReleased(MouseEvent e) {
                if (e.isPopupTrigger()) {
                    popupMenu.show(e.getComponent(), e.getX(), e.getY());
                }
            }
        });
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                new CustomPopupMenu().setVisible(true);
            }
        });
    }
}

2. 使用JavaFX：

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.ContextMenu;
import javafx.scene.control.MenuItem;
import javafx.scene.control.TextArea;
import javafx.scene.input.MouseButton;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

public class CustomContextMenu extends Application {
    @Override
    public void start(Stage primaryStage) {
        primaryStage.setTitle("Custom Context Menu");

        TextArea textArea = new TextArea();
        textArea.setContextMenu(createContextMenu());

        StackPane root = new StackPane();
        root.getChildren().add(textArea);
        primaryStage.setScene(new Scene(root, 300, 200));
        primaryStage.show();
    }

    private ContextMenu createContextMenu() {
        ContextMenu contextMenu = new ContextMenu();

        MenuItem menuItem1 = new MenuItem("菜单项1");
        MenuItem menuItem2 = new MenuItem("菜单项2");
        MenuItem menuItem3 = new MenuItem("菜单项3");

        menuItem1.setOnAction(e -> {
            System.out.println("点击了菜单项1");
        });

        menuItem2.setOnAction(e -> {
            System.out.println("点击了菜单项2");
        });

        menuItem3.setOnAction(e -> {
            System.out.println("点击了菜单项3");
        });

        contextMenu.getItems().addAll(menuItem1, menuItem2, menuItem3);

        return contextMenu;
    }

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

这些示例代码演示了如何在Java Swing和JavaFX中创建自定义的右键菜单。你可以根据自己的需求添加更多的菜单项和事件处理。