reethified / jshell-guide

jshell-example

###Step by steps guide to create java module and run on jshell (REPL) then try on unix shell script

##Check java version

java -version
rauls-MacBook-Pro:common-utils rahul$ java -version
java version "9"
Java(TM) SE Runtime Environment (build 9+181)
Java HotSpot(TM) 64-Bit Server VM (build 9+181, mixed mode)

Compile source code:

javac -d mods --module-source-path src $(find src -name '*.java')

Test

java -p mods -m com.ts.util/com.ts.util.Utils

Create package/jar

jar --create --file=mods/[e-mail] --module-version=1.0 -C mods/com.ts.util .
jar --create --file=mods/com.ts.util.jar --main-class com.ts.util.Utils -C mods/com.ts.util .
tree mods
mods
├── com.ts.util
│   ├── com
│   │   └── ts
│   │       └── util
│   │           └── Utils.class
│   └── module-info.class
├── com.ts.util.jar
└── [e-mail]

Let's try it with jshell

rauls-MacBook-Pro:common-utils rahul$ jshell --class-path 'mods/[e-mail]'
|  Welcome to JShell -- Version 9
|  For an introduction type: /help intro

jshell> com.ts.util.Utils.regexReplace("jshell hello world","\\s","++")
$1 ==> "jshell++hello++world"

Try using bash command

echo 'com.ts.util.Utils.regexReplace("jshell hello world","\\s","++")' | jshell --class-path 'mods/[e-mail]' --feedback concise |sed -n '2p' | sed -En 's/[^>]*>(.+)/\1/gp'

You can also create one more script that will take argument as java command and run on jshell

./common-utils/bin/run-jshell.sh 'com.ts.util.Utils.regexReplace("jshell hello world","\\s","++")'