Java generics, get Class of generic parameter

Question

I have an abstract class:

public abstract class RootProcessor {
    Class clazz;
}

I need to fill ClassT clazz;

Answer 1

There is a post of the same subject: Reflecting generics

And a class that implement it:TypeArgumentsUtils.java

An example is in the unit test.

So if you have this class:

public class BarProcessor extends RootProcessor {
    public BarProcessor() {
    }
}

than you would get the first parameter with:

Class barClass = TypeArgumentsUtils.getFirstTypeArgument(
        RootProcessor.class, BarProcessor.class);