搭建Scala开发环境

本文以CentOS 7为例,介绍如何搭建Scala开发环境:

(1)安装Scala :
执行“yum install scala”命令:

[root@localhost ~]# yum install scala
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: centos.mirrors.tds.net
 * extras: bay.uchicago.edu
 * updates: dallas.tx.mirror.xygenhosting.com
Nothing to do

提示找不到Scala安装包,所以采用另外方式。使用wget命令直接下载:

[root@localhost ~]# wget http://downloads.typesafe.com/scala/2.11.6/scala-2.11.6.rpm
--2015-05-27 22:07:32--  http://downloads.typesafe.com/scala/2.11.6/scala-2.11.6.rpm
......
Length: 111919675 (107M) [application/octet-stream]
Saving to: ‘scala-2.11.6.rpm’

100%[=========================================================================>] 111,919,675  298KB/s   in 6m 15s

2015-05-27 22:13:48 (291 KB/s) - ‘scala-2.11.6.rpm’ saved [111919675/111919675]

接下来安装Scala

[root@localhost ~]# rpm -ivh scala-2.11.6.rpm
Preparing...                          ################################# [100%]
Updating / installing...
   1:scala-2.11.6-0                   ################################# [100%]

安装成功,执行Scala

[root@localhost ~]# scala
/usr/bin/scala: line 23: java: command not found

运行Scala需要JRE支持,所以下一步安装Java环境。

(2)执行yum install java

[root@localhost ~]# yum install java
......
Complete!

(3)运行scala,打印“Hello world!”:

[root@localhost ~]# scala
Welcome to Scala version 2.11.6 (OpenJDK 64-Bit Server VM, Java 1.8.0_45).
Type in expressions to have them evaluated.
Type :help for more information.

scala> print("Hello world!")
Hello world!
scala> :quit

安装成功!

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