Further Customization of Java Syntax Highlighting in Vim

are used for special characters appearing in strings, strings proper, boolean literals, and special instance references (`super`, `this`, `null`), respectively. Javadoc is a program that takes special comments out of Java program files and creates HTML pages. The standard configuration will highlight this HTML code similarly to HTML files (see |html.vim|). You can even add JavaScript and CSS inside this code (see below). The HTML rendering and the Markdown rendering diverge as follows: 1. The first sentence (all characters up to the first period `.`, which is followed by a whitespace character or a line terminator, or up to the first block tag, e.g. `@param`, `@return`) is colored as `*SpecialComment` special comments. 2. The text is colored as `*Comment` comments. 3. HTML comments are colored as `*Special` special symbols. 4. The standard Javadoc tags (`@code`, `@see`, etc.) are colored as `*Special` special symbols and some of their arguments are colored as `*Function` function names. To turn this feature off for both HTML and Markdown, add the following line to your startup file: > :let g:java_ignore_javadoc = 1 Alternatively, only suppress HTML comments or Markdown comments: > :let g:java_ignore_html = 1 :let g:java_ignore_markdown = 1 See |ft-java-plugin| for additional support available for Markdown comments. If you use the special Javadoc comment highlighting described above, you can also turn on special highlighting for JavaScript, Visual Basic scripts, and embedded CSS (stylesheets). This only makes sense if any of these languages actually appear in Javadoc comments. The variables to use are > :let g:java_javascript = 1 :let g:java_css = 1 :let g:java_vb = 1 Note that these three variables are maintained in the HTML syntax file. Numbers and strings can be recognized in non-Javadoc comments with > :let g:java_comment_strings = 1 When 'foldmethod' is set to "syntax", blocks of code and multi-line comments will be folded. No text is usually written in the first line of a multi-line comment, making folded contents of Javadoc comments less informative with the default 'foldtext' value; you may opt for showing the contents of a second line for any comments written in this way, and showing the contents of a first line otherwise, with > :let g:java_foldtext_show_first_or_second_line = 1 HTML tags in Javadoc comments can additionally be folded by following the instructions listed under |html-folding| and giving explicit consent with > :let g:java_consent_to_html_syntax_folding = 1 Do not default to this kind of folding unless ALL start tags and optional end tags are balanced in Javadoc comments; otherwise, put up with creating runaway folds that break syntax highlighting. Trailing whitespace characters or a run of space characters before a tab character can be marked as an error with > :let g:java_space_errors = 1 but either kind of an error can be suppressed by also defining one of > :let g:java_no_trail_space_error = 1 :let g:java_no_tab_space_error = 1 In order to highlight nested parens with different colors, define colors for `javaParen`, `javaParen1`, and `javaParen2`. For example, > :hi link javaParen Comment or > :hi javaParen ctermfg=blue guifg=#0000ff Certain modifiers are incompatible with each other, e.g. `abstract` and `final`: > :syn list javaConceptKind and can be differently highlighted as a group than other modifiers with > :hi link javaConceptKind NonText If you notice highlighting errors while scrolling backwards, which are fixed when redrawing with CTRL-L, try setting the "g:java_minlines" variable to a larger number: > :let g:java_minlines = 50 This will make the syntax synchronization start 50 lines before the first displayed line. The default value is 10. The disadvantage of using a larger number is that redrawing can become slow. Significant changes to the Java platform are gradually introduced in the form of JDK Enhancement Proposals (JEPs)

This section details how to further customize Java syntax highlighting in Vim. It explains how to disable Javadoc highlighting entirely or selectively suppress HTML or Markdown comments. It covers enabling special highlighting for JavaScript, Visual Basic scripts, and embedded CSS within Javadoc comments and how to recognize numbers and strings in non-Javadoc comments. The section also describes customizing folding behavior for Javadoc comments, including displaying the second line of multi-line comments, and enabling folding of HTML tags within Javadoc comments. Additionally, it covers options for marking trailing whitespace or spaces before tabs as errors, customizing highlighting for nested parentheses and incompatible modifiers, and adjusting the 'g:java_minlines' variable to fix highlighting errors during backwards scrolling. It concludes by mentioning JDK Enhancement Proposals (JEPs).