在运行时从上传的文件覆盖JCombox值

JComboBox<String> comboBox = new JComboBox<>();
comboBox.addItem("Option 1");
comboBox.addItem("Option 2");
comboBox.addItem("Option 3");

JFileChooser fileChooser = new JFileChooser();
int result = fileChooser.showOpenDialog(null);
if (result == JFileChooser.APPROVE_OPTION) {
    File file = fileChooser.getSelectedFile();
    // 处理上传的文件
}

try {
    BufferedReader reader = new BufferedReader(new FileReader(file));
    String line;
    while ((line = reader.readLine()) != null) {
        comboBox.addItem(line);
    }
    reader.close();
} catch (IOException e) {
    e.printStackTrace();
}