暗黙の型変換その2 Date型からString型へ

scala> implicit def dateToString(date:java.util.Date):String = {
     |   import java.text._
     |   println("java.util.DateからStringへ変換")
     |   val sdf = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss")
     |   sdf.format(date)
     | }
warning: there were 1 feature warning(s); re-run with -feature for details
dateToString: (date: java.util.Date)String

scala> val strDate:String = new java.util.Date()
java.util.DateからStringへ変換
strDate: String = 2014/03/11 00:19:07