Groovy Console read input

groovy input groovy-console
James picture James · Apr 17, 2012 · Viewed 53.7k times · Source

I'm just starting to learn Groovy and I am experimenting in GroovyConsole.

Is there a way I can read user input? I have tried the code below but I get an error.

BufferedReader br = new BufferedReader(new InputStreamReader(System.in))

print "Input:"

input = br.readLine()

println "You entered: $input"

This is the error I am receiving:

Exception thrown
17-Apr-2012 02:52:39 org.codehaus.groovy.runtime.StackTraceUtils sanitize

WARNING: Sanitizing stacktrace:

java.io.IOException: Stream closed

Is there anything I need to import?

Any help would be great.

Thanks

Answer

Renato picture Renato · Mar 6, 2013

I got here trying to find out the easiest way to read user input from the command line... I found the answer elsewhere, will post here to document the 'real' Groovy way as it's still missing:

def username = System.console().readLine 'What is your name?'
println "Hello $username"

As Larry Battle says, if using the groovy console, make sure to look at the background 'black' window for the output and to type input.

EDIT

In an environment where Console is not available, such as running from your IDE, probably, use this instead:

println "What is your name?"
println "Your name is ${System.in.newReader().readLine()}"

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