WaitTest2.java

final class WaitTest2 {

    public static void main(String[] args) {
        new WaitTest2().run();
    }

    void run() {
        class Closure {
            private final Runnable runnable;

            public Closure(Runnable runnable) {
                this.runnable = runnable;
            }

            void call() {
                runnable.run();
            }
        }

        Closure closure = new Closure(() -> {
            try {
                wait(1000);
                System.out.println("AHA!");
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
        });
        synchronized (this) {
            closure.call();
        }
    }
}