Java Reference
In-Depth Information
Listing B-3. Groovy Script for “Hello World”
println "Hello World!"
You can run Groovy scripts and classes through the command line, GroovyShell, or GroovyConsole.
GroovyShell
GroovyShell is an interactive command-line application (shell) that allows you to create, run, save,
and load Groovy scripts and classes. To start GroovyShell, run
groovysh
. Figure
B-1
illustrates using
GroovyShell to execute a simple script.
Figure B-1.
Using GroovyShell
As you can see, the script prints
vishal
. Then you see
===> null
. As a matter of convention,
Groovy always returns the results of methods. In this case, there is no result, so
null
is returned.
GroovyShell contains a built-in help facility that you can use to learn more about the shell. To access
it, type
help
at the prompt. Figure
B-2
shows the help listing.
