spark_プログラム受信外部入力パラメータ

spark-submit  --class "test" --master spark://master:7077  /
--driver-cores 16 --executor-cores  16  --conf spark.driver.memory=30G /
--conf spark.executor.memory=30G /
/root/xxx/test/target/scala-2.11/test_2.11-1.0.jar /
"0.8"

def main(args: Array[String]): Unit = {
    val t=args(0).toDouble
}