What does the @code java annotation do

{@code ...} is a Javadoc tag that tells Javadoc that the text inside the braces is source code and should not be treated as HTML. Javadoc should also format the text in a code block differently than the other text. This is a similar concept to the "code sample" text that the editor for StackOverflow uses when you format a question or answer.

Javadocs are specially-formatted source code comments for class descriptions, constructors, and methods to help generate HTML documentation about source code. For example the Java API is fully documented using Javadocs for reading online or in an IDE. See the Java API Documentation Generator for details.