功能接口，不需要任何东西，也不会返回 [英] functional interface that takes nothing and returns nothing

问题描述

在JDK中是否有一个标准的功能接口，它什么都不需要，并且什么也不返回？我找不到一个。如下所示：

Is there a standard functional interface in the JDK that takes nothing and returns nothing? I cannot find one. Something like the following:

@FunctionalInterface
interface Action {
  void execute();
}

推荐答案

Runnable如何：

How about Runnable :

@FunctionalInterface
public interface Runnable {
    /**
     * When an object implementing interface <code>Runnable</code> is used
     * to create a thread, starting the thread causes the object's
     * <code>run</code> method to be called in that separately executing
     * thread.
     * <p>
     * The general contract of the method <code>run</code> is that it may
     * take any action whatsoever.
     *
     * @see     java.lang.Thread#run()
     */
    public abstract void run();
}

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