class TestBlankFinalError {
    final int a;

    TestBlankFinalError() {
        a = 1;
    }
    //NO ERROR
    Runnable r1 = new Runnable() {
        @Override
        public void run() {
            System.out.println(a);
        }
    };

    //ERROR "the blank final field may not have been initialized."
    Runnable r2 = () -> {
        System.out.println(a);
    };
}