tuple元祖

scala> val tuple1 = (1, 2, 3.0F, "heihei", 4)
tuple1: (Int, Int, Float, String, Int) = (1,2,3.0,heihei,4)
scala> println(tuple1._4)
heihei

tuple的遍历

scala> for(e <- tuple1.productIterator) {
     | println(e)
     | }