public class Inner {
    static Object keep;

    void run() {
        keep = new Object() {};
    }

    protected void finalize() throws Throwable {
        System.out.println("finalize");
    }

    public static void main(String[] args) throws Exception {
        new Inner().run();
        System.gc();
        Thread.sleep(1000L);
        System.out.println("done");
    }
}