Flink Table to DataStream:如何访问列名？

import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.table.api.Table;
import org.apache.flink.table.api.bridge.java.StreamTableEnvironment;

public class FlinkTableToDataStreamExample {
    public static void main(String[] args) throws Exception {
        // 创建流处理环境
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        StreamTableEnvironment tableEnv = StreamTableEnvironment.create(env);

        // 创建一个DataStream
        DataStream<Tuple2<String, Integer>> dataStream = env.fromElements(
                new Tuple2<>("Alice", 25),
                new Tuple2<>("Bob", 30),
                new Tuple2<>("Charlie", 35)
        );

        // 将DataStream注册为一个表
        Table table = tableEnv.fromDataStream(dataStream, "name, age");

        // 获取表格中的列名
        String[] columnNames = table.getFieldNames();
        for (String columnName : columnNames) {
            System.out.println("Column Name: " + columnName);
        }
    }
}