Posts

Fixed size, no insert or delete, no search by contents, no useful toString, no guarantees of uniqueness or order. The honest inventory of what an array doesn't do — which is exactly the table of contents of the next series.

A varargs parameter is an array with a different face. What the compiler does, why main(String[] args) and main(String... args) are the same, the overloading rules that confuse people, and what @SafeVarargs means.

Arrays are covariant and generics aren't: why Object[] objects = new String[3] compiles and fails at runtime, why you can't write new T[], and how to live with toArray(T[]).

A complete tour of java.util.Arrays: sort, binarySearch, fill, setAll, copyOf, compare, mismatch, toString, deepToString, stream, parallelSort and parallelPrefix — with the asList trap explained separately.

Why b = a copies nothing, what clone() does with an array of objects, when to use System.arraycopy or Arrays.copyOfRange, and why equals() on arrays is almost never what you want — but Arrays.equals and deepEquals are.

The three ways to iterate an array and what you gain and lose with each one: the classic indexed for, the for-each and its syntactic sugar, and Arrays.stream with IntStream to avoid paying for boxing.

What gets stored in your browser when you visit this site: two technical preference cookies, none for advertising or tracking, and what happens when a post embeds a third-party video.

The third-party fonts, images, trademarks and libraries this site uses, with their license and attribution — and the terms the site's own content is published under.

What this publishing project is: the topics it covers, how posts are grouped into series, why every article ships with audio and diagrams, how AI-generated content is flagged, and where to find the licenses, cookies and privacy pages.