RxJava ReplaySubject|极客教程

RxJava ReplaySubject

ReplaySubject将事件/项回放给当前和晚到的观察者。

类声明

以下是 io.reactivex.subjects.ReplaySubject 类的声明。

public final class ReplaySubject<T>
extends Subject<T>

ReplaySubject 示例

使用您选择的任何编辑器，在 C:> RxJava 中创建以下 Java 程序。

ObservableTester.java

import io.reactivex.subjects.ReplaySubject;
public class ObservableTester  {
   public static void main(String[] args) {   
      final StringBuilder result1 = new StringBuilder();
      final StringBuilder result2 = new StringBuilder();         

      ReplaySubject<String> subject = ReplaySubject.create(); 
      subject.subscribe(value -> result1.append(value) ); 
      subject.onNext("a"); 
      subject.onNext("b"); 
      subject.onNext("c"); 
      subject.subscribe(value -> result2.append(value)); 
      subject.onNext("d"); 
      subject.onComplete();

      //Output will be abcd
      System.out.println(result1);
      //Output will be abcd being ReplaySubject
      //as ReplaySubject emits all the items
      System.out.println(result2);
   }
}