JSoup - Select all comments

I want to select all comments from开发者_JAVA百科 a document using JSoup. I would like to do something like this:

for(Element e : doc.select("comment")) {
   System.out.println(e);
}

I have tried this:

for (Element e : doc.getAllElements()) {
  if (e instanceof Comment) {

  }

}

But the following error occurs in eclipse "Incompatible conditional operand types Element and Comment".

Cheers,

Pete

Since Comment extends Node you need to apply instanceof to the node objects, not the elements, like this:

    for(Element e : doc.getAllElements()){
        for(Node n: e.childNodes()){
            if(n instanceof Comment){
                System.out.println(n);
            }
        }
    }

In Kotlin you can get via Jsoup every Comment of the whole Document or a specific Element with:

fun Element.getAllComments(): List<Comment> {
  return this.allElements.flatMap { element ->
    element.childNodes().filterIsInstance<Comment>()
  }
}