🎨 Patterns for Practical Elegance            Engineering Resilience, Not Just... Tagged with programming, coding, java, javascript.

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Awesome Java Newsletter

A comprehensive guide to writing clean, maintainable code with practical examples in both Node.js and Java. Covers essential principles including meaningful naming conventions, single responsibility functions, DRY logic implementation, proper formatting, immutability patterns, and structured logging. Emphasizes that clean code is a mindset focused on building resilient, scalable systems that are understandable and extendable for future developers.

Clean Code Reimagined

2️⃣ Keep Functions Focused (and Use Logic That Fits)

3️⃣ Don't Repeat Decisions — Let the Code Decide

6️⃣ Logs Are Not Noise — They're Breadcrumbs

Clean code reimagine is just cool title.
But the content is to basic to consider to be “Clean Code”.
This is the Quoted from the source
<code>In this updated cookbook, we dissect common code patterns and refactor them into clean, professional-grade examples — with clarity, real-world relevance, and a few new flavors.</code>
BUTTTT giving the example like this which is a Problem
<ol>
<li>the Java DRY Logic.</li>
</ol>
<pre><code class="language-java">Map&lt;String, Runnable&gt; roleActions = Map.of(
 &quot;ADMIN&quot;, this::showAdminPanel,
 &quot;EDITOR&quot;, this::showEditorPanel
);
roleActions.get(user.getRole()).run();
</code></pre>
What will happen to this gentle-people? it potentially NPE.
The Author can use Enum but no, it should be Potentially NPE.
<ol start="2">
<li>Giving an example how Modern async Only For Node.JS why?? because the Author Afraid of JAVA.</li>
</ol>
<pre><code class="language-java"> public static String fetchData(String urlString) throws Exception {
 HttpURLConnection connection = null;
 try {
 URL url = new URL(urlString);
 connection = (HttpURLConnection) url.openConnection();
 connection.setRequestMethod(&quot;GET&quot;);
 connection.setConnectTimeout(10_000); // 10 sec
 connection.setReadTimeout(10_000); // 10 sec

 int status = connection.getResponseCode();
 InputStream is = (status &gt;= 200 &amp;&amp; status &lt; 300)
 ? connection.getInputStream()
 : connection.getErrorStream();

 BufferedReader reader = new BufferedReader(new InputStreamReader(is, &quot;UTF-8&quot;));
 StringBuilder response = new StringBuilder();
 String line;
 while ((line = reader.readLine()) != null) {
 response.append(line);
 }
 reader.close();
 return response.toString();
 } finally {
 if (connection != null) connection.disconnect();
 }
 }
</code></pre>
Or use Okhttp and Gson, much readable
<pre><code class="language-java"> private static final OkHttpClient client = new OkHttpClient();
 private static final Gson gson = new Gson();

 public static Map&lt;String, Object&gt; fetchData(String url) throws IOException {
 Request request = new Request.Builder().url(url).build();
 try (Response response = client.newCall(request).execute()) {
 if (!response.isSuccessful()) throw new IOException(&quot;Unexpected code &quot; + response);
 return gson.fromJson(response.body().string(), Map.class);
 }
 }
</code></pre>
<ol start="3">
<li>Favor immutability
the example from the Post</li>
</ol>
<pre><code class="language-java">User updatedUser = new User(user.getName(), user.getScore() + 10);
</code></pre>
Honestly i don’t mind you code like this, but im gonna silently judge you.
Because there’s a better way, use Lombok
<pre><code class="language-java">@Value
@Builder(toBuilder = true)
public class User {
 int id;
 String name;
 int score;
}

var user = User.builder().id(1).name(&quot;alice&quot;).score(0).build();
var updatedUserScore = user.toBuilder().score(user.getScore() + 10).build();

</code></pre>
This way, we don;t need to pass all the value to new Object.
It’s useful, imagine if the object that you need to update have 20 variables, but you only need 1 variable update and still want kept the immutable behaviour.
I Welcome the critique to people who mastering the art of java code.