4.Which of the following are primitive Java types?

题目

4.Which of the following are primitive Java types?
I.int
II.Integer
III.Double
(a) II and III only
(b) I and II only
(c) I only
(d) I,II and III only

答案

JAVA的8种原始（primitive)数据类型：byte、short、int、long、float、double、char
所以选C.
他们对应的封装（Wrapper）数据类型分别是：Byte,Short,Integer,Long,Float,Double,Character
不要搞混啦