thufir@doge:~$
thufir@doge:~$ tree IdeaProjects/
IdeaProjects/
├── groovy
│   ├── groovy.iml
│   └── src
│       └── hi.groovy
└── java
    ├── java.iml
    └── src
        └── com
            └── company
                └── Main.java

6 directories, 4 files
thufir@doge:~$
thufir@doge:~$
thufir@doge:~$ cat IdeaProjects/groovy/src/hi.groovy
class GroovyJMSExample {
    def sendMessage() {
        println "hello"
    }

    static void main(String[] args) {
        sendMessage()
    }
}
thufir@doge:~$
thufir@doge:~$ groovy IdeaProjects/groovy/src/hi.groovy
Caught: groovy.lang.MissingMethodException: No signature of method: static GroovyJMSExample.sendMessage() is applicable for argument types: () values: []
Possible solutions: sendMessage()
groovy.lang.MissingMethodException: No signature of method: static GroovyJMSExample.sendMessage() is applicable for argument types: () values: []
Possible solutions: sendMessage()
	at GroovyJMSExample.main(hi.groovy:7)
thufir@doge:~$