RxJava BehaviorSubject|极客教程

RxJava BehaviorSubject

BehaviorSubject会将观察到的最新项以及所有后续观察到的项发送给每个订阅的观察者。

类声明

以下是 **io.reactivex.subjects.BehaviorSubject ** 类的声明−

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

BehaviorSubject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.BehaviorSubject;
public class ObservableTester  {
   public static void main(String[] args) {   
      final StringBuilder result1 = new StringBuilder();
      final StringBuilder result2 = new StringBuilder();         
      BehaviorSubject<String> subject =  BehaviorSubject.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 cd being BehaviorSubject 
      //(c is last item emitted before subscribe)
      System.out.println(result2);
   }
}