Scala_001安装入门

 Windows安装

 https://www.coursera.org/learn/progfun1/lecture/8LrWd/tools-setup-for-windows

基础配置（安装,IDE,SBT）

https://www.coursera.org/learn/progfun1/home/week/1

cmd

scalac- name.scala-->scala name.scala

 object hello_test2 extends App {
     println("Hello world") 
 }