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📜  RxJava-数学运算符

📅  最后修改于: 2020-11-12 05:29:55             🧑  作者: Mango

以下是对Observable发出的整个项目进行操作的运算符。

Sr.No. Operator & Description
1

Average

Evaluates averages of all items and emit the result.
2

Concat

Emits all items from multiple Observable without interleaving.
3

Count

Counts all items and emit the result.
4

Max

Evaluates max valued item of all items and emit the result.
5

Min

Evaluates min valued item of all items and emit the result.
6

Reduce

Apply a function on each item and return the result.
7

Sum

Evaluates sum of all items and emit the result.

数学运算符示例

使用您选择的任何编辑器(例如，C：\> RxJava)创建以下Java程序。

ObservableTester.java

import io.reactivex.Observable;
//Using concat operator to operate on multiple Observables
public class ObservableTester  {
   public static void main(String[] args)  throws InterruptedException {    
      Integer[] numbers = { 1, 2, 3, 4, 5, 6};
      String[] letters = {"a", "b", "c", "d", "e", "f", "g"};
      final StringBuilder result = new StringBuilder();
      Observable observable1 = Observable.fromArray(letters);
      Observable observable2 = Observable.fromArray(numbers);
      Observable.concat(observable1, observable2)
         .subscribe( letter -> result.append(letter));
      System.out.println(result);
   }
}

验证结果

使用javac编译器编译类，如下所示：

C:\RxJava>javac ObservableTester.java

现在如下运行ObservableTester-

C:\RxJava>java ObservableTester

它应该产生以下输出-

abcdefg123456