标签：strong environ arguments delay 提取 rabl space comm cli
C:\Users\guowli>java -version java version "1.8.0_101" Java(TM) SE Runtime Environment (build 1.8.0_101-b13) Java HotSpot(TM) 64-Bit Server VM (build 25.101-b13, mixed mode) C:\Users\guowli>javac -version javac 1.8.0_101
;%SCALA_HOME%\bin;%SCALA_HOME%\lib\dt.jar;%SCALA_HOME%\lib\tools.jar.;
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
C:\Users\guowli>scala -version
Scala code runner version 2.12.4 -- Copyright 2002-2017, LAMP/EPFL and Lightbend, Inc.
C:\Users\guowli>sclac -version
‘sclac‘ is not recognized as an internal or external command,
operable program or batch file.
C:\Users\guowli>scala
Welcome to Scala 2.12.4 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_101).
Type in expressions for evaluation. Or try :help.
scala> println("Hello Scala!")
Hello Scala!
scala> :quit
C:\Users\guowli>
C:\Users\guowli>scala -help Usage: scala <options> [<script|class|object|jar> <arguments>] or scala -help All options to scalac (see scalac -help) are also allowed. The first argument to scala after the options designates what to run. If no argument is given, the Scala REPL, an interactive shell, is started. Otherwise, the Scala runner will try to run the named target, either as a compiled class with a main method, a jar file with a Main-Class manifest header, or as a Scala source file to compile and run. The REPL accepts expressions to evaluate. Try `:help` to see more commands. The script runner will invoke the main method of a top-level object if it finds one; otherwise, the script code is run locally to a synthetic main method with arguments available in a variable `args`. Options to scala which reach the Java runtime: -Dname=prop passed directly to Java to set system properties -J<arg> -J is stripped and <arg> passed to Java as-is -nobootcp do not put the Scala jars on the boot classpath (slower) Other startup options: -i <file> preload <file> before starting the REPL -I <file> preload <file>, enforcing line-by-line interpretation -e <string> execute <string> as if entered in the REPL -save save the compiled script in a jar for future use -nc no compilation daemon: do not use the fsc offline compiler If the runner does not correctly guess how to run the target: -howtorun what to run <script|object|jar|guess> (default: guess) When running a script or using -e, an already running compilation daemon (fsc) is used, or a new one started on demand. Use the -nc option to create a fresh compiler instead. C:\Users\guowli>
package test
object helloscala {
def main(args: Array[String]) {
println("Hello, Scala!")
}
}
anliven@DESKTOP-68OFQFP MINGW64 /d/Anliven/Anliven-Code/ScalaProjects
$ mkdir Testing
anliven@DESKTOP-68OFQFP MINGW64 /d/Anliven/Anliven-Code/ScalaProjects
$ cd Testing/
anliven@DESKTOP-68OFQFP MINGW64 /d/Anliven/Anliven-Code/ScalaProjects/Testing
$ ls -l
total 0
anliven@DESKTOP-68OFQFP MINGW64 /d/Anliven/Anliven-Code/ScalaProjects/Testing
$ vim Testing.scala
anliven@DESKTOP-68OFQFP MINGW64 /d/Anliven/Anliven-Code/ScalaProjects/Testing
$ cat Testing.scala
object Testing extends App {
println("Hello, "+args(0)+"!")
}
anliven@DESKTOP-68OFQFP MINGW64 /d/Anliven/Anliven-Code/ScalaProjects/Testing
$ scalac Testing.scala
anliven@DESKTOP-68OFQFP MINGW64 /d/Anliven/Anliven-Code/ScalaProjects/Testing
$ ls -l
total 13
-rw-r--r-- 1 anliven 197121 2752 10月 25 23:58 ‘Testing$.class‘
-rw-r--r-- 1 anliven 197121 767 10月 25 23:58 ‘Testing$delayedInit$body.class‘
-rw-r--r-- 1 anliven 197121 768 10月 25 23:58 Testing.class
-rw-r--r-- 1 anliven 197121 64 10月 25 23:58 Testing.scala
anliven@DESKTOP-68OFQFP MINGW64 /d/Anliven/Anliven-Code/ScalaProjects/Testing
$ scala Testing Anliven
Hello, Anliven!
anliven@DESKTOP-68OFQFP MINGW64 /d/Anliven/Anliven-Code/ScalaProjects/Testing
$ ls -l
total 13
-rw-r--r-- 1 anliven 197121 2752 10月 25 23:58 ‘Testing$.class‘
-rw-r--r-- 1 anliven 197121 767 10月 25 23:58 ‘Testing$delayedInit$body.class‘
-rw-r--r-- 1 anliven 197121 768 10月 25 23:58 Testing.class
-rw-r--r-- 1 anliven 197121 64 10月 25 23:58 Testing.scala
anliven@DESKTOP-68OFQFP MINGW64 /d/Anliven/Anliven-Code/ScalaProjects/Testing
$
$ scala
Welcome to Scala 2.12.2 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_131).
Type in expressions for evaluation. Or try :help.
scala> println("Hello, Scala!")
Hello, Scala!
scala> val x=1
x: Int = 1
scala> println(x)
1
scala> :quit
获取SBT的帮助信息：在命令行下执行“sbt -h”，或者执行“sbt”后输入help并回车。
anliven@DESKTOP-68OFQFP MINGW64 /d/Anliven
$ sbt console
[warn] No sbt.version set in project/build.properties, base directory: D:\Anliven
[info] Set current project to anliven (in build file:/D:/Anliven/)
[info] Starting scala interpreter...
Welcome to Scala 2.12.3 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_131).
Type in expressions for evaluation. Or try :help.
scala> println("Hello, Scala!")
Hello, Scala!
scala> val x=2
x: Int = 2
scala> println(x)
2
scala> :quit
[success] Total time: 41 s, completed 2017-10-25 23:52:39
anliven@DESKTOP-68OFQFP MINGW64 /d/Anliven
$
println("Welcome to the Scala worksheet") //> Welcome to the Scala worksheet
var x = 1 //> x : Int = 1
println(x) //> 1
root@Ubuntu16:~# apt-get update root@Ubuntu16:~# root@Ubuntu16:~# apt-get install openjdk-8-jre openjdk-8-jdk root@Ubuntu16:~# root@Ubuntu16:~# java -version openjdk version "1.8.0_151" OpenJDK Runtime Environment (build 1.8.0_151-8u151-b12-0ubuntu0.16.04.2-b12) OpenJDK 64-Bit Server VM (build 25.151-b12, mixed mode) root@Ubuntu16:~#
root@Ubuntu16:~# dpkg -L openjdk-8-jdk | grep ‘/bin‘|head -1 /usr/lib/jvm/java-8-openjdk-amd64/bin root@Ubuntu16:~# vim ~/.bashrc root@Ubuntu16:~# source ~/.bashrc root@Ubuntu16:~# cat ~/.bashrc|head -1 export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64 root@Ubuntu16:~# root@Ubuntu16:~# echo $JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64 root@Ubuntu16:~# root@Ubuntu16:~# $JAVA_HOME/bin/java -version openjdk version "1.8.0_151" OpenJDK Runtime Environment (build 1.8.0_151-8u151-b12-0ubuntu0.16.04.2-b12) OpenJDK 64-Bit Server VM (build 25.151-b12, mixed mode) root@Ubuntu16:~# root@Ubuntu16:~# javac -version javac 1.8.0_151 root@Ubuntu16:~# $JAVA_HOME/bin/javac -version javac 1.8.0_151 root@Ubuntu16:~#
wget https://downloads.lightbend.com/scala/2.12.4/scala-2.12.4.tgz root@Ubuntu16:~# ls -l scala-2.12.4.tgz -rw-r--r-- 1 root root 19741785 10月 11 16:05 scala-2.12.4.tgz root@Ubuntu16:~# root@Ubuntu16:~# tar -zxf scala-2.12.4.tgz -C /usr/local root@Ubuntu16:~# cd /usr/local root@Ubuntu16:/usr/local# root@Ubuntu16:/usr/local# mv ./scala-2.12.4/ ./scala root@Ubuntu16:/usr/local# root@Ubuntu16:/usr/local# chown -R root ./scala root@Ubuntu16:/usr/local#
root@Ubuntu16:/usr/local# vim ~/.bashrc root@Ubuntu16:/usr/local# source ~/.bashrc root@Ubuntu16:/usr/local# cat ~/.bashrc |head -1 export PATH=$PATH:/usr/local/scala/bin root@Ubuntu16:/usr/local# root@Ubuntu16:/usr/local# scala Welcome to Scala 2.12.4 (OpenJDK 64-Bit Server VM, Java 1.8.0_151). Type in expressions for evaluation. Or try :help. scala> :help All commands can be abbreviated, e.g., :he instead of :help. :edit <id>|<line> edit history :help [command] print this summary or command-specific help :history [num] show the history (optional num is commands to show) :h? <string> search the history :imports [name name ...] show import history, identifying sources of names :implicits [-v] show the implicits in scope :javap <path|class> disassemble a file or class name :line <id>|<line> place line(s) at the end of history :load <path> interpret lines in a file :paste [-raw] [path] enter paste mode or paste a file :power enable power user mode :quit exit the interpreter :replay [options] reset the repl and replay all previous commands :require <path> add a jar to the classpath :reset [options] reset the repl to its initial state, forgetting all session entries :save <path> save replayable session to a file :sh <command line> run a shell command (result is implicitly => List[String]) :settings <options> update compiler options, if possible; see reset :silent disable/enable automatic printing of results :type [-v] <expr> display the type of an expression without evaluating it :kind [-v] <type> display the kind of a type. see also :help kind :warnings show the suppressed warnings from the most recent line which had any scala> :quit root@Ubuntu16:/usr/local#
root@Ubuntu16:~/testcode# ls -l
总用量 4
-rw-r--r-- 1 root root 96 11月 14 17:10 test.scala
root@Ubuntu16:~/testcode#
root@Ubuntu16:~/testcode# cat test.scala
object HelloWorld {
def main(args: Array[String]){
println("Hello, World!")
}
}
root@Ubuntu16:~/testcode#
root@Ubuntu16:~/testcode# scalac test.scala
root@Ubuntu16:~/testcode# ls -l
总用量 12
-rw-r--r-- 1 root root 602 11月 14 17:11 HelloWorld.class
-rw-r--r-- 1 root root 665 11月 14 17:11 HelloWorld$.class
-rw-r--r-- 1 root root 96 11月 14 17:10 test.scala
root@Ubuntu16:~/testcode#
root@Ubuntu16:~/testcode# scala -classpath . HelloWorld
Hello, World!
root@Ubuntu16:~/testcode# ls -l
总用量 12
-rw-r--r-- 1 root root 602 11月 14 17:11 HelloWorld.class
-rw-r--r-- 1 root root 665 11月 14 17:11 HelloWorld$.class
-rw-r--r-- 1 root root 96 11月 14 17:10 test.scala
root@Ubuntu16:~/testcode#
scalac test.scala # 编译的时候使用的是Scala文件名称 scala -classpath . HelloWorld # 执行的时候使用的是HelloWorld对象名称
标签：strong environ arguments delay 提取 rabl space comm cli
原文地址：https://www.cnblogs.com/anliven/p/10029912.html
