RxJava - PublishSubject

PublishSubject 将子项发送到当前订阅的观察者，并将终结事件发送到当前或迟到的观察者。

类声明

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

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

PublishSubject 示例

例如在 C:\RxJava 中使用任意编辑器创建以下 Java 程序。

ObservableTester.java

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

      PublishSubject<String> subject = PublishSubject.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 d only
      //as subscribed after c item emitted.
      System.out.println(result2);
   }
}

验证结果

使用 javac 编译器如下编译类 −

C:\RxJava>javac ObservableTester.java

现在如下运行 ObservableTester −

C:\RxJava>java ObservableTester

应该会产生以下输出 -

abcd
d