应用场景

当本地部署搭建完Scala开发环境后，那么就可以利用IDE开发工具进行Scala语言编程，编写一些工具等等，这里写一些简单的语法涉及，来熟悉下Scala。

运行代码

package epoint.com.cn.test001

object test001 {
 def main(args: Array[String]) {
 val msg = "hello world"
 val greetStrings = Array("i", "like", "scala")
 println(msg)
 println(max(5, 6))
 greet()
 printargs(greetStrings)

val oneTwo = List(1, 2)
 val threeFour = List(3, 4)
 val oneTwoThreeFour = oneTwo ::: threeFour
 println(oneTwo + " and " + threeFour + " were not mutated.")
 println("Thus, " + oneTwoThreeFour + " is a new list")

val pair = (99, "Luftballons")
 println(pair._1)
 println(pair._2)

var jetSet = Set("Boeing", "Airbus")
 jetSet += "Lear"
 println(jetSet.contains("Boeing"))

val romanNumeral = Map(1 -> "I", 2 -> "II",
 3 -> "III", 4 -> "IV", 5 -> "V")
 println(romanNumeral(4))

}

def max(x: Int, y: Int): Int = {
 if (x > y) x
 else
 y
 }

def greet() = println("xubin nihao")

def printargs(args: Array[String]) {
 var i = 0
 while (i < args.length) {
 println(args(i))
 i += 1
 }
 }
}

输出打印：

hello world
6
xubin nihao
i
like
scala
List(1, 2) and List(3, 4) were not mutated.
Thus, List(1, 2, 3, 4) is a new list
99
Luftballons
true
IV