gistfile1.java

String.metaClass.methodMissing { String name, args ->
    String camel = ''
    name.split('_').eachWithIndex { part, i ->
        if (i == 0) camel += part
        else camel += (part[0].toUpperCase() + part[1..-1])
    }
    
    delegate."$camel"(args)
}

println "Who got their Ruby all over my Groovy?".to_upper_case()