cannot resolve symbol f0，f1
DataStream<Tuple2<String,?Long>>?result?=?keyedEdits
????????.timeWindow(Time.seconds(5))??//指定窗口的寬度為5秒
????????.fold(new?Tuple2<>("",?0L),?new?FoldFunction<WikipediaEditEvent,?Tuple2<String,?Long>>()?{
????????????@Override
????????????public?Tuple2<String,?Long>?fold(Tuple2<String,?Long>?acc,?WikipediaEditEvent?o)?throws?Exception?{
????????????????acc.f0?=?o.getUser();
????????????????acc.f1?+=?o.getByteDiff();
????????????????return?acc;
????????????}
????????});
2019-02-18
你好，我才看到你的留言。這個問題比較可能是因為：你這個類中import的是不是StreamExecutionEnvironment，或者看看Tuple2是不是引用對了。