hi Wenjian, In C++ you can use ListBuilder together with UInt8Builder. There are examples of using ListBuilder you can look at in src/arrow/array-test.cc.
For Java you might want to have a look at how Spark SQL converts its Array<T> types into Arrow (there should be other examples in the Java unit test suite, too): https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/arrow/ArrowWriter.scala - Wes On Mon, Aug 13, 2018 at 6:00 AM, Xu,Wenjian <zero...@gmail.com> wrote: > Hi, > > If I want to create list<list<byte>> structure (as shown in > https://arrow.apache.org/docs/memory_layout.html), what class(es) do I need > to use in Java API and C++ API? > > Any suggestion would be appreciated. Thanks. > > Best regards, > Wenjian
