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changed scala example from java "style" to scala #20458

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changed scala example from java "style" to scala
mantovani Jan 31, 2018
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Update quick-start.md
mantovani Jan 31, 2018
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18 changes: 8 additions & 10 deletions docs/quick-start.md
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Expand Up @@ -299,19 +299,17 @@ We'll create a very simple Spark application, `SimpleApp.java`:
import org.apache.spark.sql.SparkSession;
import org.apache.spark.sql.Dataset;

public class SimpleApp {
public static void main(String[] args) {
String logFile = "YOUR_SPARK_HOME/README.md"; // Should be some file on your system
SparkSession spark = SparkSession.builder().appName("Simple Application").getOrCreate();
Dataset<String> logData = spark.read().textFile(logFile).cache();
public class SimpleApp extends App {

@srowen srowen Jan 31, 2018

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Yes, this isn't valid Java, and it's supposed to be Java. It was correct before.

@mantovani mantovani Jan 31, 2018

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Sorry, I updated the wrong section.

String logFile = "YOUR_SPARK_HOME/README.md"; // Should be some file on your system
SparkSession spark = SparkSession.builder().appName("Simple Application").getOrCreate();
Dataset<String> logData = spark.read().textFile(logFile).cache();

long numAs = logData.filter(s -> s.contains("a")).count();
long numBs = logData.filter(s -> s.contains("b")).count();
long numAs = logData.filter(s -> s.contains("a")).count();
long numBs = logData.filter(s -> s.contains("b")).count();

System.out.println("Lines with a: " + numAs + ", lines with b: " + numBs);
System.out.println("Lines with a: " + numAs + ", lines with b: " + numBs);

spark.stop();
}
spark.stop();
}
{% endhighlight %}

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