1 <properties>
2   <scala.version>2.10.5</scala.version>
3 </properties>

package com.scalatest

/**
 * Hello world!
 *
 */
object App  {
  def main(args: Array[String]): Unit = {
    println("hello scala")
  }
}

1 <dependency>
2       <groupId>org.apache.spark</groupId>
3       <artifactId>spark-core_2.11</artifactId>
4       <version>1.6.1</version>
5     </dependency>

object Test {
  def main(args: Array[String]): Unit = {
    val conf = new SparkConf().setAppName("sparktest").setMaster("local")
    val sc = new SparkContext(conf)
    val fileRDD = sc.textFile("F:\\data\\wordcount.txt")
    fileRDD.flatMap(_.split(" ")).map((_, 1)).reduceByKey(_+_).collect().foreach(println)

  }
}

 1 "C:\Program Files\Java\jdk1.7.0_79\bin\java" -Didea.launcher.port=7538 "-Didea.launcher.bin.path=C:\Program Files (x86)\JetBrains\IntelliJ IDEA 2016.2.5\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.7.0_79\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.7.0_79\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.7.0_79\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.7.0_79\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.7.0_79\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.7.0_79\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.7.0_79\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.7.0_79\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.7.0_79\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.7.0_79\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.7.0_79\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.7.0_79\jre\lib\jce.jar;C:\Program Files\Java\jdk1.7.0_79\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.7.0_79\jre\lib\jfxrt.jar;C:\Program 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Files (x86)\JetBrains\IntelliJ IDEA 2016.2.5\lib\idea_rt.jar" com.intellij.rt.execution.application.AppMain com.scalatest.Test
 2 Exception in thread "main" java.lang.NoSuchMethodError: scala.Predef$.$conforms()Lscala/Predef$$less$colon$less;
 3     at org.apache.spark.util.Utils$.getSystemProperties(Utils.scala:1546)
 4     at org.apache.spark.SparkConf.<init>(SparkConf.scala:59)
 5     at org.apache.spark.SparkConf.<init>(SparkConf.scala:53)
 6     at com.scalatest.Test$.main(Test.scala:12)
 7     at com.scalatest.Test.main(Test.scala)
 8     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 9     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
10     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
11     at java.lang.reflect.Method.invoke(Method.java:606)
12     at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)