Scala类型

一 Scala类型体系

 

二 实例

1. C:\Users\lenovo>scala
2. Welcome to Scala2.12.1(JavaHotSpot(TM)64-BitServer VM,Java1.8.0_101).
3. Typein expressions for evaluation.Ortry:help.
5. scala> val a:Byte=10
6. a:Byte=10
8. scala> val b:Short=20
9. b:Short=20
11. scala> val c:Int=30
12. c:Int=30
14. scala> val d:Long=40
15. d:Long=40
17. scala> val e:Float=50
18. e:Float=50.0
20. scala> val f:Double=57849.454
21. f:Double=57849.454
23. scala> val x:Long=b
24. x:Long=20
26. scala> val m =true
27. m:Boolean=true
29. scala> val n =false
30. n:Boolean=false
32. scala> val q='X'
33. q:Char= X
35. scala> val u:Unit=()
36. u:Unit=()
38. scala> val p=()
39. p:Unit=()
41. scala>def foo()=thrownewException("wrong")
42. foo:()Nothing

 

三 Scala的String

1、构建于Java的String之上

2、新增了字符串插值的特性

 

四 实例

1. scala> val name="cakin"
2. name:String= cakin
4. scala> s"my name is ${name}"
5. res0:String=my name is cakin