如何使用Java命令运行Groovy脚本？

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:

1. Run groovyc MyTest.groovy
2. 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?

Answer 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