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From guoxiaolongzte <>
Subject [GitHub] spark issue #17580: [20269][Structured Streaming] add class 'JavaWordCountPr...
Date Thu, 13 Apr 2017 06:40:32 GMT
Github user guoxiaolongzte commented on the issue:
    Excuse me,I would like to ask, these examples of Java examples, why use some of the Scala
to write it?thank you!
        SparkConf sparkConf = new SparkConf().setAppName("**JavaKafkaWordCount**");
        // Create the context with 2 seconds batch size
        JavaStreamingContext jssc = new JavaStreamingContext(sparkConf, new Duration(2000));
        int numThreads = Integer.parseInt(args[3]);
        Map<String, Integer> topicMap = new HashMap<>();
        String[] topics = args[2].split(",");
        for (String topic: topics) {
          topicMap.put(topic, numThreads);
        JavaPairReceiverInputDStream<String, String> messages =
                KafkaUtils.createStream(jssc, args[0], args[1], topicMap);
        JavaDStream<String> lines =**(Tuple2::_2);**

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