https://jizuiba.netlify.app/tags/%E5%B9%B6%E5%8F%91%E7%BC%96%E7%A8%8B/Recent content in 并发编程 on Jizuiba`s BlogHugozh-cnThu, 03 Apr 2025 00:00:00 +0000https://jizuiba.netlify.app/posts/completablefuture%E5%B8%B8%E7%94%A8api/Thu, 03 Apr 2025 00:00:00 +0000https://jizuiba.netlify.app/posts/completablefuture%E5%B8%B8%E7%94%A8api/<h2 id="一创建-completablefuture">一、创建 CompletableFuture</h2> <ul> <li> <p><strong><code>CompletableFuture.supplyAsync(Supplier&lt;U&gt; supplier)</code></strong><br> 异步执行一个任务并返回结果。任务会在默认的线程池（ForkJoinPool.commonPool）中执行。</p> <figure class="article-codeblock article-codeblock--java" data-code-language="java" style="--code-max-height: 32rem;"><figcaption class="article-codeblock__header" aria-label="Code block tools"><button type="button" class="article-codeblock__copy" data-copy-default="复制" data-copy-success="已复制" data-copy-error="失败" aria-label="复制"> <svg class="article-codeblock__copy-icon" width="14" height="14" viewBox="0 0 24 24" aria-hidden="true"> <rect x="9" y="9" width="13" height="13" rx="2" ry="2"></rect> <path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"></path> </svg> <span class="article-codeblock__copy-text">复制</span> </button><span class="article-codeblock__language" aria-label="Code language">java</span></figcaption><div class="article-codeblock__body"><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-java" data-lang="java"><span class="line"><span class="cl"><span class="n">CompletableFuture</span><span class="o">&lt;</span><span class="n">String</span><span class="o">&gt;</span><span class="w"> </span><span class="n">future</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">CompletableFuture</span><span class="p">.</span><span class="na">supplyAsync</span><span class="p">(()</span><span class="w"> </span><span class="o">-&gt;</span><span class="w"> </span><span class="p">{</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="s">&#34;Hello, World!&#34;</span><span class="p">;</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="p">});</span></span></span></code></pre></div></div> </figure></li> <li> <p><strong><code>CompletableFuture.runAsync(Runnable runnable)</code></strong><br> 异步执行一个没有返回值的任务。</p>