Usage of parameters inside <> in a class

Asked Oct 14 '19 at 18:31

Active Oct 14 '19 at 18:31

Viewed 31 times

I'm a beginner in Java and Android development. I stumbled upon the super class AsyncTask which its usage might look like this:

private class DownloadData extends AsyncTask<String, Void, String> {
        private static final String TAG = "DownloadData";
...
}

I don't understand the usage of the parameters inside the <>. These are not related to the constructor as I checked this superclass and its default constructor doesn't accept any parameters. So what is the usage of paramteres inside <> of a class?

PLEASE NOTE: I'm not asking about those specific three parameters, I know what they stand for, I'm just asking about general use of this syntax. Also, does this syntax have a name, so I can research this further?

Thanks in advance

asked Oct 14 '19 at 18:31

sir-haver

3,096
7
41
85

3

[What are generics in Java?](https://stackoverflow.com/questions/7815528/what-are-generics-in-java) – Avi Oct 14 '19 at 18:33
https://howtodoinjava.com/java/generics/complete-java-generics-tutorial/ – ptk Oct 14 '19 at 18:34
Thanks a lot guys, I'm marking as duplicate – sir-haver Oct 14 '19 at 18:35

Usage of parameters inside <> in a class

0 Answers0