WebOct 10, 2024 · SimpleKafkaProducer simpleProducer = new SimpleKafkaProducer (); The type scala .ScalaObject cannot be resolved. It is indirectly referenced from required .class files. 将scala-library.jar添加到项目的classpath路径下即可。. The . It is indirectly referenced It is indirectly referenced from requi. The XXX cannot be resolved. WebFeb 18, 2015 · [/scala] Either Option is nice to indicate failure, but if you need to provide some more information about the failure Option is not powerful enough. In that case Either[L,R] can be used. It has 2 implementations, Left and Right. Both can wrap a custom type, respectively type L and type R.
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