object wb{
        def main(args:Array[String]){
                println("Happy everyday!DATA-CENTER!")
                println(new java.util.Date())
        }

root@VM-52-248-ubuntu:/var/www/html/scalaw# ^C
root@VM-52-248-ubuntu:/var/www/html/scalaw# vim wb.scala
root@VM-52-248-ubuntu:/var/www/html/scalaw# scalac wb.scala
root@VM-52-248-ubuntu:/var/www/html/scalaw# scala wb
Happy everyday!
Sat Apr 29 02:21:37 CST 2017
root@VM-52-248-ubuntu:/var/www/html/scalaw# vim wb.scala
root@VM-52-248-ubuntu:/var/www/html/scalaw# scalac wb.scala
root@VM-52-248-ubuntu:/var/www/html/scalaw# scala wb
Happy everyday!DATA-CENTER!
Sat Apr 29 02:23:02 CST 2017
root@VM-52-248-ubuntu:/var/www/html/scalaw# scala wb
Happy everyday!DATA-CENTER!
Sat Apr 29 02:24:12 CST 2017
root@VM-52-248-ubuntu:/var/www/html/scalaw#

object w{
        def main(args:Array[String]){
                println("Happy everyday!")
        }
}
~
~
~

root@VM-52-248-ubuntu:/var/www/html# vim w.java
root@VM-52-248-ubuntu:/var/www/html# javac w.java
root@VM-52-248-ubuntu:/var/www/html# java w
Hello World
root@VM-52-248-ubuntu:/var/www/html# apt-get install scala
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  libhawtjni-runtime-java libjansi-java libjansi-native-java libjline2-java scala-library scala-parser-combinators scala-xml
Suggested packages:
  scala-doc
The following NEW packages will be installed:
  libhawtjni-runtime-java libjansi-java libjansi-native-java libjline2-java scala scala-library scala-parser-combinators scala-xml
0 upgraded, 8 newly installed, 0 to remove and 162 not upgraded.
Need to get 23.6 MB of archives.
After this operation, 28.1 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://mirrors.tencentyun.com/ubuntu xenial/universe amd64 libhawtjni-runtime-java all 1.10-1 [54.0 kB]
Get:2 http://mirrors.tencentyun.com/ubuntu xenial/universe amd64 libjansi-native-java all 1.0-4 [35.3 kB]
Get:3 http://mirrors.tencentyun.com/ubuntu xenial/universe amd64 libjansi-java all 1.4-3 [57.4 kB]
Get:4 http://mirrors.tencentyun.com/ubuntu xenial/universe amd64 libjline2-java all 2.11-4 [107 kB]
Get:5 http://mirrors.tencentyun.com/ubuntu xenial/universe amd64 scala-library all 2.11.6-6 [9239 kB]
Get:6 http://mirrors.tencentyun.com/ubuntu xenial/universe amd64 scala-parser-combinators all 1.0.3-3 [355 kB]
Get:7 http://mirrors.tencentyun.com/ubuntu xenial/universe amd64 scala-xml all 1.0.3-3 [601 kB]
Get:8 http://mirrors.tencentyun.com/ubuntu xenial/universe amd64 scala all 2.11.6-6 [13.1 MB]
Fetched 23.6 MB in 2s (8880 kB/s)
Selecting previously unselected package libhawtjni-runtime-java.
(Reading database ... 70092 files and directories currently installed.)
Preparing to unpack .../libhawtjni-runtime-java_1.10-1_all.deb ...
Unpacking libhawtjni-runtime-java (1.10-1) ...
Selecting previously unselected package libjansi-native-java.
Preparing to unpack .../libjansi-native-java_1.0-4_all.deb ...
Unpacking libjansi-native-java (1.0-4) ...
Selecting previously unselected package libjansi-java.
Preparing to unpack .../libjansi-java_1.4-3_all.deb ...
Unpacking libjansi-java (1.4-3) ...
Selecting previously unselected package libjline2-java.
Preparing to unpack .../libjline2-java_2.11-4_all.deb ...
Unpacking libjline2-java (2.11-4) ...
Selecting previously unselected package scala-library.
Preparing to unpack .../scala-library_2.11.6-6_all.deb ...
Unpacking scala-library (2.11.6-6) ...
Selecting previously unselected package scala-parser-combinators.
Preparing to unpack .../scala-parser-combinators_1.0.3-3_all.deb ...
Unpacking scala-parser-combinators (1.0.3-3) ...
Selecting previously unselected package scala-xml.
Preparing to unpack .../scala-xml_1.0.3-3_all.deb ...
Unpacking scala-xml (1.0.3-3) ...
Selecting previously unselected package scala.
Preparing to unpack .../scala_2.11.6-6_all.deb ...
Unpacking scala (2.11.6-6) ...
Setting up libhawtjni-runtime-java (1.10-1) ...
Setting up libjansi-native-java (1.0-4) ...
Setting up libjansi-java (1.4-3) ...
Setting up libjline2-java (2.11-4) ...
Setting up scala-library (2.11.6-6) ...
Setting up scala-parser-combinators (1.0.3-3) ...
Setting up scala-xml (1.0.3-3) ...
Setting up scala (2.11.6-6) ...
update-alternatives: using /usr/share/scala-2.11/bin/scala to provide /usr/bin/scala (scala) in auto mode
root@VM-52-248-ubuntu:/var/www/html#