Java 9 透過引入一些介面來支援建立反應式流： Publisher、Subscriber、Subscription與實作Publisher 介面的SubmissionPublisher 類別。每個介面可以根據反應式流的原則扮演不同的角色。
我們可以使用Subscriber 介面訂閱由publisher發布的資料。我們需要實作Subscriber 介面並為抽象方法提供實作。
import java.util.concurrent.Flow;
import java.util.concurrent.SubmissionPublisher;
import java.util.stream.IntStream;
public class SubscriberImplTest {
public static class Subscriber implements <strong>Flow.Subscriber<Integer></strong> {
private <strong>Flow.Subscription</strong> subscription;
private boolean isDone;
<strong> @Override</strong>
public void <strong>onSubscribe</strong>(Flow.Subscription subscription) {
System.out.println("Subscribed");
this.subscription = subscription;
this.subscription.request(1);
}
<strong>@Override</strong>
public void <strong>onNext</strong>(Integer item) {
System.out.println("Processing " + item);
this.subscription.request(1);
}
<strong>@Override</strong>
public void <strong>onError</strong>(Throwable throwable) {
throwable.printStackTrace();
}
<strong>@Override</strong>
public void <strong>onComplete()</strong> {
System.out.println("Processing done");
isDone = true;
}
}
public static void main(String args[]) throws InterruptedException {
<strong>SubmissionPublisher<Integer></strong> publisher = new <strong>SubmissionPublisher<></strong><strong>()</strong>;
<strong>Subscriber </strong>subscriber = new <strong>Subscriber()</strong>;
publisher.subscribe(subscriber);
<strong>IntStream</strong> intData = <strong>IntStream.rangeClosed</strong>(1, 10);
intData.forEach(<strong>publisher::submit</strong>);
publisher.<strong>close()</strong>;
while(!subscriber.isDone) {
Thread.sleep(10);
}
System.out.println("Done");
}
}<strong>Subscribed Processing 1 Processing 2 Processing 3 Processing 4 Processing 5 Processing 6 Processing 7 Processing 8 Processing 9 Processing 10 Processing done Done</strong>
以上是在Java 9中，我們如何實作Subscriber介面？的詳細內容。更多資訊請關注PHP中文網其他相關文章！
