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type-post status-publish format-standard hentry category-computers"> + <h2 class="entry-title">Java has issues</h2> + <div class="entry-meta"> + <span class="meta-prep meta-prep-author">Posted on</span> <a href="http://lukeshu.ath.cx/1/wordpress/2011/01/java-has-issues/" title="22:47" rel="bookmark"><span class="entry-date">2011/01/03</span></a> <span class="meta-sep">by</span> <span class="author vcard"><a class="url fn n" href="http://lukeshu.ath.cx/1/wordpress/author/lts/" title="View all posts by lts">lts</a></span> + </div><!-- .entry-meta --> + <div class="entry-content"> +<p class="aside">This was originally posted to Facebook by me at 2010-09-02 23:19. It was edited by me there 2010-07-03.</p> +<p>Java is an alright language. There are a lot of things it does right, but there<br /> +are a few things it doesn’t.</p> +<ol> +<li>Distinction between classes and packages. I should be able to create<br /> + sub-classes the same way as I add classes to a package; a package should<br /> + just be an empty class.</li> +<li>Too many primitives. I should be able to (re-)construct more of the<br /> + language.</li> +<li>No preprocessor/inlines. OO isn’t an excuse for this, make me do it at the<br /> + class level (or rather, source file, not supporting `#include’ is fine). I<br /> + should at least be able to add `#define int8=byte’ like in C. This<br /> + wouldn’t be as much of an issue if all these things weren’t primitives; I<br /> + could just do “public class int8 extends byte”. (yes, I could extend the<br /> + `Byte’ class, but it wouldn’t come with all the syntactic sugar primitives<br /> + get.)</li> +<li>Numbers: names. Yes the names used are long-standing convention in CS.<br /> + These include some of the worst short-sighted mistakes in all of<br /> + hackerdom… because they stuck. Yet, most reasonable languages can still<br /> + support them, and sane equivalents.</p> +<ul> +<li>byte -> int8</li> +<li>short -> int16</li> +<li>int -> int32</li> +<li>long -> int64</li> +<li>float -> float32</li> +<li>double -> float64</li> +</ul> +<p> This would easily be fixed if they weren’t all primitives (point 2), or if<br /> + I had a preprocessor (point 3).</li> +<li>Numbers: unsigned. How about unsigned integers (uint16)? This would be<br /> + easy to implement, if everything weren’t a damn primitive.</li> +<li>Give me an actual `struct’, like in C. I’m not asking for full manual<br /> + memory management, just the ability to organize a chunk of it; you can<br /> + still manage it for me. It would make serialization hellofalot<br /> + easier.</li> +<li>It’s inconsistent about whether it uses the system encoding or it’s<br /> + internal encoding. The String object just became worthless to anyone<br /> + wanting to do any amount of I18N.</li> +<li>It’s internal encoding is junk. It maps UTF-16 symbols onto the `char’<br /> + primitive, which is 16 bits.</p> +<ol> +<li>UTF-16 is junk, use UTF-8</li> +<li>With any UTF encoding you must allow for a dynamic bit-length, for<br /> + UTF-16 it’s 16-32 bits, UTF-8 is 8-32 bits</li> +</ol> +<p> I understand how/why it arrived at the solution it uses; at the time Java<br /> + was designed, it was using UCS-2, which is a 16-bit encoding, and was<br /> + superseded by UTF-16 in 1996 with Unicode 2.0. However, this is one of<br /> + those things where you specify a new JVM version, and switch to UTF-8. You<br /> + can even leave a legacy mode in the JVM that still uses UCS-2.</li> +<li>Octal prefix: `0′ is used as the prefix to specify an octal literal. Any<br /> + third-grader can tell you why using a 0 as a prefix to a number is a bad<br /> + idea; the number might just have padded zeros. Let’s look at the prefix<br /> + used for hexadecimal: `0x’. This is great:</p> +<ol> +<li>It starts with a numeric character, which means that it must be a<br /> + literal. If it started with an alphabetic character, it might be a<br /> + variable name.</li> +<li>The second character is a alphabetic character that is not used in<br /> + any number system that is used in computer science. This allows it<br /> + to serve a a unique identifier.</li> +</ol> +<p> Given these reasons, let’s think of a new prefix for octal… how about<br /> + `0o’. That took literally less than 10 seconds for me to realize why `0′<br /> + sucked, and to think of a better one.<a href="#java-problems-f1">*</a></li> +</ol> +<p>All-in-all, its still better than C++</p> +<p><span id="java-problems-f1">*</span> although, writing this gave me an even<br /> +better idea, but it would break `0x<value>’ for hex, which is incredibly<br /> +common among many languages:<br /> +`<base-in-decimal>x<value>’<br /> +so octal would be `8x<value>’<br /> +and hex would be `16x<value>’<br /> +It would be incredibly understandable, and, depending on implementation allow<br /> +simple arbitrary-base literals.</p> + + </div><!-- .entry-content --> + <div class="entry-links"> + + </div> + + <div class="entry-utility"> + This entry was posted in <a href="http://lukeshu.ath.cx/1/wordpress/category/computers/" title="View all posts in Computers" rel="category tag">Computers</a>. Bookmark the <a href="http://lukeshu.ath.cx/1/wordpress/2011/01/java-has-issues/" title="Permalink to Java has issues" rel="bookmark">permalink</a>. + + </div><!-- .entry-utility --> + </div><!-- #post-## --> + + <div id="nav-below" class="navigation"> + <div class="nav-previous"><a href="http://lukeshu.ath.cx/1/wordpress/2010/11/fuse-is-crazy/" rel="prev"><span class="meta-nav">←</span> FUSE is crazy</a></div> + <div class="nav-next"><a href="http://lukeshu.ath.cx/1/wordpress/2011/01/pointers-in-java/" rel="next">Pointers in Java <span class="meta-nav">→</span></a></div> + </div><!-- #nav-below --> + + + + <div id="comments"> + <div id="respond"> + <h3 id="reply-title">Leave a Reply <small><a rel="nofollow" id="cancel-comment-reply-link" href="/1/wordpress/2011/01/java-has-issues/#respond" style="display:none;">Cancel reply</a></small></h3> + <form action="http://lukeshu.ath.cx/1/wordpress/wp-comments-post.php" method="post" id="commentform"> + <p class="comment-notes">Your email address will not be published. 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