Java 的 List 与 Scala 的 Seq 相互转换

1. List 转 Seq：

List<String> tmpList = new ArrayList<>();
tmpList.add("abc");
Seq<String> tmpSeq = JavaConverters.asScalaIteratorConverter(tmpList.iterator()).asScala().toSeq();

2. Seq 转 List：

List<String> tmpList = scala.collection.JavaConversions.seqAsJavaList(tmpSeq);

 

import scala.collection.JavaConverters._
 
 val list: java.util.List[Int] = Seq(1,2,3,4).asJava
 val buffer: scala.collection.mutable.Buffer[Int] = list.asScala