在.java文件中编写Groovy代码

Question

I'm just new at Groovy and I'm following a simple tutorial. I have this code:

class Example {
static void main(String[] args) {
  // Using a simple println statement to print output to the console
  println('Hello World');
}
}

but when I try it in my IDE, I got the error related to println . I think that the Groovy syntax is not recognized. So, is there a way to write groovy code in a .java file?

Answer 1

Simply: don't do that.

The file extension .java tells each and any reader (may that be a human reader or any kind of tooling):

in here, Java code to be found!

Thus: when you put anything into that file that is not Java, you are simply asking for trouble! (I have seen people doing such things, and you won't believe how much pain that caused on other people working on the same project; so on behalf of all the people around you: please bury this idea. Now! )

You could look at this the other way round: Groovy is very close to Java, so if you think you have to "mix" things - see how far you get doing that within some groovy files!