Custom tags should not be created using html because javadoc might change it's implementation or how it presents data, maybe they'll start using markdown in the future, also the javadoc exporter will not catch missing information and you might have empty tags. First use whatever tag you want: notice that the custom tag has the format @ prefix. This is due to the fact that doclet or another eclipse plugin might release it's own tag with the same name, and your tag would just override the standard tag, so we add a prefix to make it less likely of that happening. Custom tags that could override future standard tags: @wrapper to avoid potential overrides, use at least one period character .

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After configuring the settings for the first two screens of this dialog using next to change screens you should see this screen: you should notice that the extra javadoc options. Text box has the value you must add for the javadoc exporter to create the html equivalent of your tag. In our case the option is this if you want multiple tags, put them on a new line: now when you export your javadoc i also recommend saving an ant script so you don't have to go through this dialog every time you will have your custom tag in bold with the description, and the values underneath.

I have yet to find a way to add the ability to add auto completion for the custom tags, but it seems impossible in indigo, maybe it'll be in future releases not sure if juno has it. This document describes the style guide, tag and image conventions we use in documentation comments for java programs written at java software, oracle. It does not rehash related material covered elsewhere: at java software, we have several guidelines that might make our documentation comments different than those of third party developers.

Our documentation comments define the official java platform api specification. To this end, our target audience is those who write java compatibility tests, or conform or re implement the java platform, in addition to developers. We spend time and effort focused on specifying boundary conditions, argument ranges and corner cases rather than defining common programming terms, writing conceptual overviews, and including examples for developers. Thus, there are commonly two different ways to write doc comments as api specifications, or as programming guide documentation.

A staff with generous resources can afford to blend both into the same documentation properly chunked however, our priorities dictate that we give prime focus to writing api specifications in doc comments. This is why developers often need to turn to other documents, such as java se technical documentation and the java tutorials for programming guides.

writing api specifications

ideally, the java api specification comprises all assertions required to do a clean room implementation of the java platform for write once, run anywhere such that any java applet or application will run the same on any implementation. This may include assertions in the doc comments plus those in any architectural and functional specifications usually written in framemaker or in any other document. This definition is a lofty goal and there is some practical limitation to how fully we can specify the api. The following are guiding principles we try to follow: the java platform api specification is defined by the documentation comments in the source code and any documents marked as specifications reachable from those comments. notice that the specification does not need to be entirely contained in doc comments. In particular, specifications that are lengthy are sometimes best formatted in a separate file and linked to from a doc comment.

the java platform api specification is a contract between callers and implementations. the specification describes all aspects of the behavior of each method on which a caller can rely. It does not describe implementation details, such as whether the method is native or synchronized. The specification should describe textually the thread safety guarantees provided by a given object. In the absence of explicit indication to the contrary, all objects are assumed to be thread safe i.e. unless otherwise noted, the java api specification assertions need to be implementation independent. Exceptions must be set apart and prominently marked as such. the java api specification should contain assertions sufficient to enable software quality assurance to write complete java compatibility kit jck tests. this means that the doc comments must satisfy the needs of the conformance testing by sqa.

The comments should not document bugs or how an implementation that is currently out of spec happens to work.

writing programming guide documentation

what separates api specifications from a programming guide are examples, definitions of common programming terms, certain conceptual overviews such as metaphors , and descriptions of implementation bugs and workarounds. There is no dispute that these contribute to a developer's understanding and help a developer write reliable applications more quickly. However, because these do not contain api assertions , they are not necessary in an api specification. You can include any or all of this information in documentation comments and can include custom tags.

At java software, we consciously do not include this level of documentation in doc comments, and instead include either links to this information links to the java tutorial and list of changes or include this information in the same documentation download bundle as the api spec the jdk documentation bundle includes the api specs as well as demos, examples, and programming guides. It's useful to go into further detail about how to document bugs and workarounds. There is sometimes a discrepancy between how code should work and how it actually works.

It's useful to decide up front whether you want to document these in the doc comments. At java software we have decided to document both of these outside of doc comments, though we do make exceptions. api spec bugs are bugs that are present in the method declaration or in the doc comment that affects the syntax or semantics. An example of such a spec bug is a method that is specified to throw a nullpointerexception when null is passed in, but null is actually a useful parameter that should be accepted and was even implemented that way. If a decision is made to correct the api specification, it would be useful to state that either in the api specification itself, or in a list of changes to the spec, or both.

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Documenting an api difference like this in a doc comment, along with its workaround, alerts a developer to the change where they are most likely to see it. Note that an api specification with this correction would still maintain its implementation independence. code bugs are bugs in the implementation rather than in the api specification. Code bugs and their workarounds are often likewise distributed separately in a bug report. However, if the javadoc tool is being used to generate documentation for a particular implementation, it would be quite useful to include this information in the doc comments, suitably separated as a note or by a custom tag say @bug .

who owns and edits the doc comments

the doc comments for the java platform api specification is owned programmers. It is a basic premise that writers and programmers honor each other's capabilities and both contribute to the best doc comments possible. Often it is a matter of negotiation to determine who writes which parts of the documentation, based on knowledge, time, resources, interest, api complexity, and on the state of the implementation itself. Ideally, the person designing the api would write the api specification in skeleton source files, with only declarations and doc comments, filling in the implementation only to satisfy the written api contract. In this case, the api designer would write the initial doc comments using sparse language, and then the writer would review the comments, refine the content, and add tags. If the doc comments are an api specification for re implementors, and not simply a guide for developers, they should be written either by the programmer who designed and implemented the api, or by a api writer who is or has become a subject matter expert.

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If the implementation is written to spec but the doc comments are unfinished, a writer can complete the doc comments by inspecting the source code or writing programs that test the api. A writer might inspect or test for exceptions thrown, parameter boundary conditions, and for acceptance of null arguments. However, a much more difficult situation arises if the implementation is not written to spec. Then a writer can proceed to write an api specification only if they either know the intent of the designer either through design meetings or through a separately written design specification or have ready access to the designer with their questions.

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Thus, it may be more difficult for a writer to write the documentation for interfaces and abstract classes that have no implementors. With that in mind, these guidelines are intended to describe the finished documentation comments. They are intended as suggestions rather than requirements to be slavishly followed if they seem overly burdensome, or if creative alternatives can be found. When a complex system such as java which contains about 60 packages is being developed, often a group of engineers contributing to a particular set of packages, such as javax.swing may develop guidelines that are different from other groups. This may be due to the differing requirements of those packages, or because of resource constraints. api documentation api docs or api specifications api specs on line or hardcopy descriptions of the api, intended primarily for programmers writing in java.