JList<String> myList = new JList<>(new String[]{"Item 1", "Item 2", "Item 3"});

myList.addMouseListener(new MouseAdapter() {
    public void mouseClicked(MouseEvent evt) {
        if (evt.getClickCount() == 2) { // 检测双击事件
            JList list = (JList)evt.getSource();
            int index = list.locationToIndex(evt.getPoint());
            
            // 确保点击的是有效项
            if (index >= 0 && index < list.getModel().getSize()) {
                Object item = list.getModel().getElementAt(index);
                System.out.println("双击了: " + item);
                
                // 在这里添加你的双击处理逻辑
            }
        }
    }
});

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

public class JListDoubleClickExample {
    public static void main(String[] args) {
        JFrame frame = new JFrame("JList双击事件示例");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(300, 200);
        
        // 创建JList
        String[] data = {"苹果", "香蕉", "橙子", "葡萄", "西瓜"};
        JList<String> fruitList = new JList<>(data);
        
        // 添加双击事件监听器
        fruitList.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {
                if (e.getClickCount() == 2) {
                    JList<?> list = (JList<?>) e.getSource();
                    int index = list.locationToIndex(e.getPoint());
                    
                    // 检查是否点击在有效项上
                    if (index >= 0) {
                        Object selectedItem = list.getModel().getElementAt(index);
                        JOptionPane.showMessageDialog(frame, 
                            "你双击了: " + selectedItem, 
                            "提示", 
                            JOptionPane.INFORMATION_MESSAGE);
                    }
                }
            }
        });
        
        frame.add(new JScrollPane(fruitList));
        frame.setVisible(true);
    }
}

fruitList.addMouseListener(new MouseAdapter() {
    @Override
    public void mouseClicked(MouseEvent e) {
        if (e.getClickCount() == 2) {
            // 获取双击项
            int index = fruitList.locationToIndex(e.getPoint());
            if (index >= 0) {
                String item = fruitList.getModel().getElementAt(index);
                
                // 自定义行为 - 例如在新窗口中显示详情
                JDialog detailDialog = new JDialog(frame, "详情");
                detailDialog.add(new JLabel("详细信息: " + item));
                detailDialog.pack();
                detailDialog.setVisible(true);
            }
        }
    }
});

// 添加选择监听器
fruitList.addListSelectionListener(e -> {
    if (!e.getValueIsAdjusting()) {
        System.out.println("当前选择: " + fruitList.getSelectedValue());
    }
});

// 双击监听器
fruitList.addMouseListener(new MouseAdapter() {
    @Override
    public void mouseClicked(MouseEvent e) {
        if (e.getClickCount() == 2) {
            // 双击逻辑...
        }
    }
});