<properties>

  <scala.version>2.11.11</scala.version>

</properties>

<dependencies>

  <dependency>

    <groupId>org.scala-lang</groupId>

    <artifactId>scala-library</artifactId>

    <version>${scala.version}</version>

  </dependency>

  <dependency>

    <groupId>junit</groupId>

    <artifactId>junit</artifactId>

    <version>4.4</version>

    <scope>test</scope>

  </dependency>

  <dependency>

    <groupId>org.specs</groupId>

    <artifactId>specs</artifactId>

    <version>1.2.5</version>

    <scope>test</scope>

  </dependency>

</dependencies>

<configuration>

  <scalaVersion>${scala.version}</scalaVersion>

  <args>

    <arg>-target:jvm-1.8</arg>

  </args>

</configuration>

object Hello {

  def main(args: Array[String]): Unit = {

    println("main begin...............")

    // 设置Spark的序列化方式

    System.setProperty("spark.serializer", "org.apache.spark.serializer.KryoSerializer")

    // 初始化Spark

    val sparkConf = new SparkConf().setAppName("sparkDemo")

    val sc = new SparkContext(sparkConf)

    val a = sc.parallelize(List(1,2,3,3))

    val b = a.map(x => x+1)

    //    textfileTest("C:/Users/think/Desktop/1.txt");

    val colors = Map("red" -> "#FF0000",

      "azure" -> "#F0FFFF",

      "peru" -> "#CD853F")

    val nums: Map[Int, Int] = Map()

    println( "colors 中的键为 : " + colors.keys )

    println( "colors 中的值为 : " + colors.values )

    println( "检测 colors 是否为空 : " + colors.isEmpty )

    println( "检测 nums 是否为空 : " + nums.isEmpty )

    println("main end...............")

  }

}