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doc: Update java.md (#311)

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添加List和Set集合中打印时使用lamba输出的方式。 2348522810
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jaywcjlove
2023-02-23 15:35:41 +00:00
parent ebfd8e526c
commit 87f71fd7df
3 changed files with 57 additions and 55 deletions
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@ -711,6 +711,8 @@
</span><span class="code-line"><span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token class-name">Integer</span> value <span class="token operator">:</span> nums<span class="token punctuation">)</span> <span class="token punctuation">{</span>
</span><span class="code-line"> <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>value<span class="token punctuation">)</span><span class="token punctuation">;</span>
</span><span class="code-line"><span class="token punctuation">}</span>
</span><span class="code-line"><span class="token comment">// lambda 打印元素</span>
</span><span class="code-line">nums<span class="token punctuation">.</span><span class="token function">forEach</span><span class="token punctuation">(</span>e <span class="token operator">-></span> <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>e<span class="token punctuation">.</span><span class="token function">toString</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</span></code></pre>
</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="hashmap"><a aria-hidden="true" tabindex="-1" href="#hashmap"><span class="icon icon-link"></span></a>HashMap</h3><div class="wrap-body">
<pre class="language-java"><code class="language-java code-highlight"><span class="code-line"><span class="token class-name">Map</span><span class="token generics"><span class="token punctuation">&#x3C;</span><span class="token class-name">Integer</span><span class="token punctuation">,</span> <span class="token class-name">String</span><span class="token punctuation">></span></span> m <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">HashMap</span><span class="token generics"><span class="token punctuation">&#x3C;</span><span class="token punctuation">></span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
@ -760,6 +762,7 @@
</span><span class="code-line"><span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token class-name">String</span> element <span class="token operator">:</span> set<span class="token punctuation">)</span> <span class="token punctuation">{</span>
</span><span class="code-line"> <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>element<span class="token punctuation">)</span><span class="token punctuation">;</span>
</span><span class="code-line"><span class="token punctuation">}</span>
</span><span class="code-line">set<span class="token punctuation">.</span><span class="token function">forEach</span><span class="token punctuation">(</span>e <span class="token operator">-></span> <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>e<span class="token punctuation">.</span><span class="token function">toString</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</span></code></pre>
</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="arraydeque"><a aria-hidden="true" tabindex="-1" href="#arraydeque"><span class="icon icon-link"></span></a>ArrayDeque</h3><div class="wrap-body">
<pre class="language-java"><code class="language-java code-highlight"><span class="code-line"><span class="token class-name">Deque</span><span class="token generics"><span class="token punctuation">&#x3C;</span><span class="token class-name">String</span><span class="token punctuation">></span></span> a <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayDeque</span><span class="token generics"><span class="token punctuation">&#x3C;</span><span class="token punctuation">></span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>