RxJava - ReplaySubject

ReplaySubject 重新播放事件/项目给当前和后来的观察者。

类声明

以下是 **io.reactivex.subjects.ReplaySubject<T>** 类的声明 -

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

ReplaySubject 示例

在任何编辑器中创建以下 Java 程序，例如，C:\> RxJava。

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);
   }
}

验证结果

使用 **javac** 编译器编译类，如下所示 -

C:\RxJava>javac ObservableTester.java

现在，运行 ObservableTester，如下所示 -

C:\RxJava>java ObservableTester

应该生成以下输出 -

abcd
abcd