从jlist向量中获取数据，以在Java的消息框中弹出

Vector<String> data = new Vector<>();
data.add("数据1");
data.add("数据2");
data.add("数据3");
JList<String> jList = new JList<>(data);

List<String> selectedData = jList.getSelectedValuesList();

String message = "所选数据：\n";
for (String selected : selectedData) {
    message += selected + "\n";
}
JOptionPane.showMessageDialog(null, message);