How to run Groovy script with java command?

Question

Trying to get the following script:

class MyClass {
  static void main(String... args) {
    println "Hello ${args[0]}"
  }
}

To run like Java with: java MyTest John for example.

Reading the groovy docs on scripts with main I was under the impression I could to the following to achieve my goal:

Run groovyc MyTest.groovy
Run java MyTest John

I was even under the impression that I could leave just the body of the main function and still be able to compile until a class that extends from Script...

I can run the script with groovy MyTest.groovy John and (after compiling with groovyc) groovy MyTest John

How can I accomplish my goal? What am I doing wrong?

tim_yates · Accepted Answer · 2015-09-22 16:45:29Z

1

You need groovy on the classpath when you run the java command, ie:

Save this as MyClass.groovy

class MyClass {
  static main(args) {
    println "Hello ${args[0]}"
  }
}

Then run:

groovyc MyClass.groovy

Then run:

java -cp $GROOVY_HOME/embeddable/groovy-all-2.4.4.jar:. MyClass John

answered Sep 22, 2015 at 16:45

tim_yates

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2 Comments

sargas Over a year ago

Crazy how 1 year old tutorials are already outdated on that matter. Most of them point to -cp $GROOVY_HOME/lib or don't point to anything at all.

tim_yates Over a year ago

You can get the individual jars from lib, but I tend to point to all as they I don't have to think which jars I might need ;-)

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