在MatLab中为JAR文件创建java类路径之后。我正在调用java方法,该方法每1秒返回一次双精度类型的参数。如何将此返回参数保存到数组中?import com.IPConn;import java.util.ArrayList;al.period(1000); % This gives the event.getsource for every 1 se
val stock = mapper.readValue(obs, classOf[util.Hashtable[String, String]]) }) 我在哪里得到错误 java.lang.UnsupportedOperationException: Schema for type java.util.Hashtable[String,String] is not supported
at org.apache.spark.sql.catalyst.ScalaReflectionScalaReflection.scala:73