The standard checks are included in the base distribution. Unlimited Rights apply to both GIFT technical data and software. This is the broadest right the Government can obtain and is the next best thing to a title. Unlimited Rights is the right to use, reproduce, modify, and disclose to anyone, in any manner for any purpose. This includes reverse engineering or giving technical data and software to a competitor for commercial purposes.

The @author feature can be used to record the authors of the class. This should be avoided, as it is usually out of date, and it can promote code ownership by an individual. The source control system is in a much better position to record authors. Adding a hyperlink in that first sentence makes the higher level documentation more confusing. @link can be used from the second sentence/paragraph onwards. Only use @link on the first reference to a specific class or method.

We’ll need to at least specify what package or class we want documentation to be generated for. We’ll be using some of the more common block tags in our example. For a complete list of block tags, visit the reference guide. Javadoc was an early Java language documentation generator.

Tips And Tricks For Better Java Documentation

The purpose of an API writer is to relieve the designer from some of this work. 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. GIFT source code shall be documented using the Sun Javadoc standards. Reference Sun’s Javadoc comments page for more information on Javadoc comments and style.

If the NPE occurs in a method that declares it accepts null, then that method is at fault. If the method declares it does not accept null, the caller is at fault. This can be baked into teams as a very simple rule to follow. I find null to be the most common error, resulting in NPE. By defining the expected behaviour on the parameter, I am forced to think about that case and what the code should do. Personally, I consider overview and package-level documentation to be essential, not intended to be ignored by even the casual developer. I can’t help but feel there’s a bit of a RTFM problem here, and I’m not convinced that the “locally document everything” approach minimizes the probability of misuse.

The Description

The Javadoc parser will interpret the incomplete HTML tag soup just fine. This section covers images used in the doc comments, not images directly used by the source code.

  • This will generate documentation in a directory called doc as specified with the –d flag.
  • TypeDoc automatically copies comments and tags of the function implementation to its signatures for you.
  • Basically, the spec should be complete, including boundary conditions, parameter ranges and corner cases.
  • This setting will report a violation if there is no javadoc for public member.
  • Include code examples and embedded HTML where appropriate.
  • The following programming techniques shall be used within all GIFT Java files to improve baseline performance or quality.

It runs over your source code and generates a simple report with all the tag and style errors. The tool will also help you to fix the issues, with recommended changes. To make use of the plug-in, you need to install it along with the JavaDoc tool. The API specification for methods is a contract between a caller and an implementor. Javadoc-generated API documentation contains two ways of specifying this contract for exceptions — the “throws” clause in the declaration, and the @throws Javadoc tag. These guidelines describe how to document exceptions with the @throws tag.


Non-required Javadoc is not strictly required to follow the formatting rules of Sections 7.1.2, 7.1.3, and 7.2, though it is of course recommended. At the minimum, Javadoc is present for everypublic class, and everypublic orprotected member of such a class, with a few exceptions noted below.

Just took example from your example, Sorry can’t appreciate the necessity of for having this that too for javadoc standards private variables. There are excellent opportunities to document well through JavaDocs for public APIs.

Always Mention Implementation

This can be achieved most effectively using the @link and @code features. When referring to an instance of the class being documented, use “this” to reference it. For example, “Returns a copy of this foo with the bar value updated”. Javadoc is a key part of coding in Java, yet there is relatively little discussion of what makes good Javadoc style – a coding standard.

javadoc standards

The following sections discuss the javadoc comments that are required in all GIFT Java files amplifying the Sun documentation. Javadoc comments do not need to be added for methods that override or implement other methods. However, the developer must provide javadoc comments in these cases when the overridden method’s behavior is changed and the inherited documentation is incorrect. See the javadoc documentation for a description of inheriting or re-using javadoc comments.

Style Standards¶

This makes it important to write crisp and informative initial sentences that can stand on their own. 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 . Such blocks should not be used in new code, as they rarely provide useful information about API elements defined by the file, and do not integrate well with Ordinary C++ comments may still be used to document files for developers reading the source code.

javadoc standards

Always try to keep the two factors in check, as it will help you write great API documentation or documentation in general. You can customize your comment using any tag provided by the utility.

Just as the sentences of an essay are grouped in paragraphs, so the sequence of statements of the body of a method should be grouped into logical units. Often, the clarity of the program is enhanced by preceding a logical unit by a comment that explains what it does. This comment serves as the specification for the logical unit; it should say precisely what the logical unit does. We tend to use shorter names for parameters and local variables and longer names for fields and static variables. The documentation of Google Guava’s EventBus package and classes is a good example of Javadoc.

While not required, it is recommended that the first sentence is a paragraph to itself. This helps retain the punchiness for readers of the source code. If a method is overridden in a subclass, Javadoc should only be present if it says something distinct to the original definition of the method. The @Override annotation should be used to indicate to source code readers that the Javadoc is inherited in addition to its normal meaning. Include links to any specifications written outside of doc comments if they contain assertions not present in the javadoc-generated files. If annotations are new to you, when you need to markup your source code, it might not be immediately clear whether to use an annotation or a Javadoc custom tag. This means that the doc comments must satisfy the needs of the conformance testing by SQA.

Tag Conventions

Braces are used withif,else,for,do andwhile statements, even when the body is empty or contains only a single statement. javadoc standards The order you choose for the members and initializers of your class can have a great effect on learnability.

Is Javadoc required for all programs?

Every method that somebody else can use (any public method) should have a javadoc at least stating its obvious purpose. I thoroughly document every public method in every API class. Classes which have public members but which are not intended for external consumption are prominently marked in the class javadoc.

Even if usually I forget nothing, knowing that I can and the docs are there to back my memory is great. A few guidelines for the use of console I/O commands can be found in the Performance Guidelines Checklist. In general, developers should use message logging and never use System.out.println as a method of debugging or notification. A description for using exceptions what is a baas is described in the “Exceptions and Their Use” section of the GIFT Error Handling Policy. The policy for using exceptions in GIFT is summarized in the “Policy Summary” section of the GIFT Error Handling Policy. The GIFT error handling policy is described in the GIFT Error Handling Policy. Error handling techniques used on GIFT are exceptions and assertions.

A block tag is a token that starts with @ symbol and is preceded by a whitespace. This check ignores block tags in comments and inside inline tags and . In general, every class and public method in an api or spi module must have javadocs. Exceptions to this rule are getter methods that simply return the value of a private variable and methods that override another method.

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