remove deprecated API and clean build.gradle

Author: James Lee

build.gradle

@@ -1,20 +1,10 @@
 group 'jameslee'
 version '1.0-SNAPSHOT'
 
-apply plugin: 'java'
 apply plugin: 'scala'
 apply plugin: 'idea'
 apply plugin: 'eclipse'
 
-sourceCompatibility = 1.8
-
-idea {
-    project {
-        jdkName = '1.8'
-        languageLevel = '1.8'
-    }
-}
-
 repositories {
     mavenCentral()
 }

src/main/scala/com/sparkTutorial/sparkSql/RddDatasetConversion.scala

@@ -2,7 +2,7 @@ package com.sparkTutorial.sparkSql
 
 import com.sparkTutorial.commons.Utils
 import org.apache.log4j.{Level, Logger}
-import org.apache.spark.sql.{SQLContext, SparkSession}
+import org.apache.spark.sql.SparkSession
 import org.apache.spark.{SparkConf, SparkContext}
 
 
@@ -13,7 +13,6 @@ object RddDatasetConversion extends Serializable{
     val conf = new SparkConf().setAppName("StackOverFlowSurvey").setMaster("local[1]")
 
     val sc = new SparkContext(conf)
-    val sqlContext = new SQLContext(sc)
 
     val session = SparkSession.builder().appName("StackOverFlowSurvey").master("local[1]").getOrCreate()