Java 8 java.util.function.Consumer<> 的 c# 等价物是什么？

Question

在 C# 中是否有此接口的等效项？

示例：

Consumer<Byte> consumer = new Consumer<>();
consumer.accept(data[11]);

我搜索了 Func<> 和 Action<>，但我不知道。

Consumer.accept()接口的原始Java代码非常简单。但不适合我：

void accept(T t);

/**
* Returns a composed {@code Consumer} that performs, in sequence, this
* operation followed by the {@code after} operation. If performing either
* operation throws an exception, it is relayed to the caller of the
* composed operation.  If performing this operation throws an exception,
* the {@code after} operation will not be performed.
*
* @param after the operation to perform after this operation
* @return a composed {@code Consumer} that performs in sequence this
* operation followed by the {@code after} operation
* @throws NullPointerException if {@code after} is null
*/
default Consumer<T> andThen(Consumer<? super T> after) {
    Objects.requireNonNull(after);
    return (T t) -> { accept(t); after.accept(t); };
}

Answer 1

Consumer<T>对应Action<T>，andThen方法是排序算子。您可以将 andThen 定义为扩展方法，例如

public static Action<T> AndThen<T>(this Action<T> first, Action<T> next)
{
    return e => { first(e); next(e); };
}

Answer 2

"Consumer interface represents an operation that accepts a single input argument and returns no result"

好吧，只要上面引用自 here 的内容是准确的，它大致相当于 C# 中的 Action<T> 委托；

例如这个 java 代码：

import java.util.function.Consumer;

public class Main {
  public static void main(String[] args) {
    Consumer<String> c = (x) -> System.out.println(x.toLowerCase());
    c.accept("Java2s.com");
  }
}

转换为 C# 将是：

using System;

public class Main
{
  static void Main(string[] args)
  {
     Action<string> c = (x) => Console.WriteLine(x.ToLower());
     c.Invoke("Java2s.com"); // or simply c("Java2s.com");
  }
}

Java 8 java.util.function.Consumer<> 的 c# 等价物是什么？

What is the c# equivalent of Java 8 java.util.function.Consumer<>?

java

c#

consumer