inner class

AA.java

import java.lang.reflect.Constructor;

public class AA {
    public static void main(String[] args) throws InterruptedException {
        f1();
    }
    private static void f1() {
        int i = 3;
        String s = "foo";
        Runnable r = new Runnable() {
            @Override
            public void run() {
                System.out.println(i);
                System.out.println(s);
            }
        };
        for (Constructor<?> constructor : r.getClass().getDeclaredConstructors()) {
            System.out.println(constructor);
        }
    }
}