scala - No ClassTag available for T -

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import org.apache.spark.api.java.javardd import org.apache.spark.rdd.rdd import scala.reflect.classtag    class testrdd[t: classtag](rdd: rdd[t]) extends javardd(rdd)

this statement accepted console. @ compile time following error thrown:

no classtag available t [error] class testrdd[t: classtag](rdd: rdd[t]) extends javardd(rdd) [error]                ^ [error] 1 error found [error] (jobs/it:compileincremental) compilation failed

i think want this:

class testrdd[t](rdd: list[t])(implicit c: classtag[t]) extends javardd(rdd)

use implicit auto implicit classtag of generic t.


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