With ijava, the following will set up spark:

"IJAVA_STARTUP_SCRIPT":"import org.apache.spark.; import org.apache.spark.sql.; import org.apache.spark.api.java.; import org.apache.spark.ml.linalg.; import org.apache.spark.sql.types.; import org.apache.spark.mllib.random.; SparkConf conf = null; JavaSparkContext jsc = null; SparkSession spark = null; SparkContext sc = null; class initspark{ public static void init() { String appName = "app"; String master = "local[4]"; conf = new SparkConf().setAppName(appName).setMaster(master); jsc = new JavaSparkContext(conf); spark=SparkSession.builder().sparkContext(jsc.sc()).master(master).getOrCreate(); sc=jsc.sc(); } }; "

It doesn't work with jjava. I'm not clear why not.

The closest I could come is the following

"IJAVA_STARTUP_SCRIPT":"import org.apache.spark.; import org.apache.spark.sql.; import org.apache.spark.api.java.; import org.apache.spark.ml.linalg.; import org.apache.spark.sql.types.; import org.apache.spark.mllib.random.; SparkConf conf = null; JavaSparkContext jsc = null; SparkSession spark = null; SparkContext sc = null; class initspark{ public static void init() { String appName = "app"; String master = "local[4]"; conf = new SparkConf().setAppName(appName).setMaster(master); jsc = new JavaSparkContext(conf); spark=SparkSession.builder().sparkContext(jsc.sc()).master(master).getOrCreate(); sc=jsc.sc(); } }; "

the `user than has to type "initspark.init()"