一、官网

https://www.scala-lang.org/download/all.html

二、下载

1、首先，确保安装了Java 8 JDK

[hadoop@hadoop002 ~]$ java -version

java version "1.8.0_45"

Java(TM) SE Runtime Environment (build 1.8.0_45-b14)

Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)

2、地址

https://www.scala-lang.org/download/2.11.8.html

下载scala-2.11.8.tgz

三、解压

tar -xzvf scala-2.11.8.tgz -C ~/app

四、配置环境变量并生效

vi ~/.bash_profile

export SCALA_HOME=/home/hadoop/app/scala-2.11.8

export PATH=$SCALA_HOME/bin:$PATH

source ~/.bash_profile

五、启动scala

[hadoop@hadoop002 ~]$ scala

Welcome to Scala 2.11.8 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_45).

Type in expressions for evaluation. Or try :help.

scala>

六、脚本编译

[hadoop@hadoop001 tmp]$ vi HelloScala.scala

object HelloScala {

    def main(args: Array[String]) {

        println("Hello Scala")

    }

}

编译：[hadoop@hadoop001 tmp]$ scalac HelloScala.scala

编译玩生成HelloScala.class

[hadoop@hadoop001 tmp]$ ls

HelloScala.class  HelloScala$.class  HelloScala.scala

运行：[hadoop@hadoop001 tmp]$ scala HelloScala

Hello Scala