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doc: Update java.md (#930)

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✏️ 为 Arrays.deepToString(Object[] a) 添加说明注释
🐛 修正变量名拼写错误 792451b75f
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jaywcjlove
2025-03-04 16:45:50 +00:00
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@ -329,16 +329,16 @@
</span><span class="code-line"><span class="token comment">// 输出: a b c</span>
</span></code></pre>
</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="二维数组-multidimensional-arrays"><a aria-hidden="true" tabindex="-1" href="#二维数组-multidimensional-arrays"><span class="icon icon-link"></span></a>二维数组 Multidimensional Arrays</h3><div class="wrap-body">
<pre class="language-java"><code class="language-java code-highlight"><span class="code-line"><span class="token keyword">int</span><span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token punctuation">]</span> matrix <span class="token operator">=</span> <span class="token punctuation">{</span> <span class="token punctuation">{</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">}</span><span class="token punctuation">,</span> <span class="token punctuation">{</span><span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">}</span> <span class="token punctuation">}</span><span class="token punctuation">;</span>
<pre class="language-java"><code class="language-java code-highlight"><span class="code-line"><span class="token keyword">int</span><span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token punctuation">]</span> matrix <span class="token operator">=</span> <span class="token punctuation">{</span><span class="token punctuation">{</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">}</span><span class="token punctuation">,</span> <span class="token punctuation">{</span><span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">}</span><span class="token punctuation">,</span> <span class="token punctuation">{</span><span class="token number">6</span><span class="token punctuation">}</span><span class="token punctuation">}</span><span class="token punctuation">;</span>
</span><span class="code-line"><span class="token keyword">int</span> x <span class="token operator">=</span> matrix<span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span><span class="token punctuation">;</span> <span class="token comment">// 4</span>
</span><span class="code-line"><span class="token comment">// [[1, 2, 3], [4, 5]]</span>
</span><span class="code-line"><span class="token class-name">Arrays</span><span class="token punctuation">.</span><span class="token function">deepToString</span><span class="token punctuation">(</span>matrix<span class="token punctuation">)</span>
</span><span class="code-line"><span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator">&#x3C;</span> a<span class="token punctuation">.</span>length<span class="token punctuation">;</span> <span class="token operator">++</span>i<span class="token punctuation">)</span> <span class="token punctuation">{</span>
</span><span class="code-line"> <span class="token keyword">for</span><span class="token punctuation">(</span><span class="token keyword">int</span> j <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> j <span class="token operator">&#x3C;</span> a<span class="token punctuation">[</span>i<span class="token punctuation">]</span><span class="token punctuation">.</span>length<span class="token punctuation">;</span> <span class="token operator">++</span>j<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>a<span class="token punctuation">[</span>i<span class="token punctuation">]</span><span class="token punctuation">[</span>j<span class="token punctuation">]</span><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 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><span class="token class-name">Arrays</span><span class="token punctuation">.</span><span class="token function">deepToString</span><span class="token punctuation">(</span>matrix<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</span><span class="code-line"><span class="token comment">// 输出: [[1, 2, 3], [4, 5], [6]]</span>
</span><span class="code-line"><span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator">&#x3C;</span> matrix<span class="token punctuation">.</span>length<span class="token punctuation">;</span> <span class="token operator">++</span>i<span class="token punctuation">)</span> <span class="token punctuation">{</span>
</span><span class="code-line"> <span class="token keyword">for</span><span class="token punctuation">(</span><span class="token keyword">int</span> j <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> j <span class="token operator">&#x3C;</span> matrix<span class="token punctuation">[</span>i<span class="token punctuation">]</span><span class="token punctuation">.</span>length<span class="token punctuation">;</span> <span class="token operator">++</span>j<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>matrix<span class="token punctuation">[</span>i<span class="token punctuation">]</span><span class="token punctuation">[</span>j<span class="token punctuation">]</span><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 punctuation">}</span>
</span><span class="code-line"><span class="token comment">// 输出: 1 2 3 4 5 6 7</span>
</span><span class="code-line"><span class="token comment">// 输出: 1 2 3 4 5 6</span>
</span></code></pre>
</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="排序-sort"><a aria-hidden="true" tabindex="-1" href="#排序-sort"><span class="icon icon-link"></span></a>排序 Sort</h3><div class="wrap-body">
<pre class="language-java"><code class="language-java code-highlight"><span class="code-line"><span class="token keyword">char</span><span class="token punctuation">[</span><span class="token punctuation">]</span> chars <span class="token operator">=</span> <span class="token punctuation">{</span><span class="token char">'b'</span><span class="token punctuation">,</span> <span class="token char">'a'</span><span class="token punctuation">,</span> <span class="token char">'c'</span><span class="token punctuation">}</span><span class="token punctuation">;</span>