如何停止RxJava可观察对象发出项。试图取消订阅，但仍在继续

import io.reactivex.Observable;
import io.reactivex.disposables.Disposable;

public class RxJavaExample {
    public static void main(String[] args) {
        Observable<Integer> observable = Observable.range(1, 10);

        Disposable disposable = observable.subscribe(
                item -> System.out.println("Received item: " + item),
                error -> System.out.println("Error: " + error),
                () -> System.out.println("Completed")
        );

        // 取消订阅
        disposable.dispose();
    }
}