How do you comment out a Java document?
Writing Javadoc Comments In general, Javadoc comments are any multi-line comments (” /** */ “) that are placed before class, field, or method declarations. They must begin with a slash and two stars, and they can include special tags to describe characteristics like method parameters or return values.
What is postcondition comment?
A postcondition is a condition that must always be true after the execution of a section of program code. Postconditions describe the outcome of the execution in terms of what is being returned or the state of an object.
How do you add comments to Javadoc?
Bear the following in mind when using Add Javadoc comment (Alt+Shift+J):…Keyboard shortcuts for comments and JavaDocs.
| Shortcut | Command | Description |
|---|---|---|
| Alt+Shift+J | Add Javadoc Comment | Add a Javadoc comment to the active field/method/class. See the notes below for more details on where to position the cursor. |
How do precondition and postcondition comments help with using a method?
The precondition is what the method expects in order to do its job properly. A postcondition is a condition that is true after running the method. It is what the method promises to do. Postconditions describe the outcome of running the method, for example what is being returned or the changes to the instance variables.
How do you comment an entire class in Java?
If you want to comment a block of code or a complete method, you have two options you can either line comment (//) all those selected lines or block comment (/* */) those lines. For line comment multiple lines, select multiple lines and press Ctrl + /, it will put // in front of every line.
What are the different types of comments in Java?
Java programs can have two kinds of comments: implementation comments and documentation comments.
How do you find a postcondition?
The postcondition is { m = max(x,y) }, or stated more explicitly, { (m=x Λ x >= y) V (m=y Λ y >=x) }. Try writing this code and annotating it with the pattern above to prove that Q always holds before reading further.
What do you write in a Javadoc?
Javadoc coding standards
- Write Javadoc to be read as source code.
- Public and protected.
- Use the standard style for the Javadoc comment.
- Use simple HTML tags, not valid XHTML.
- Use a single
tag between paragraphs.
- Use a single
- tag for items in a list.
- Define a punchy first sentence.
How do I fix a dangling Javadoc comment?
Just replace “Dangling Javadoc Comment” with block comment. Then you cannot use {@link } – that is indexed by IDEs only in javadocs. @Ev0oD If u want to use {@link}, maybe the best choice is disable the “Dangling Javadoc comments” report in the AS’s Inspections.
What is Java documentation comment?
The compiler ignores everything from // to the end of the line. 3. /** documentation */ This is a documentation comment and in general its called doc comment. The JDK javadoc tool uses doc comments when preparing automatically generated documentation.
How do you write a pre condition?
Preconditions may consist of one or a few sentences. There is no limitation to a sentence number but they should consist of 1 0r 2 sentences. In the same way as steps, preconditions should be concise but informative.
How do you find the strongest postcondition?
The strongest postcondition possible is x = 10; this is the most useful postcondition. Formally, if {P} S {Q} and for all Q such that {P} S {Q}, Q ⇒ Q, then Q is the strongest postcondition of S with respect to P.
What is a postcondition in software testing?
In computer programming, a postcondition is a condition or predicate that must always be true just after the execution of some section of code or after an operation in a formal specification. Postconditions are sometimes tested using assertions within the code itself.
How do I write Javadoc comments in Eclipse?
Shift-Alt-J is a useful keyboard shortcut in Eclipse for creating Javadoc comment templates.
What is a summary Javadoc?
This new tag allows the developer to explicitly specify what portion of the Javadoc comment appears in the “summary” rather than relying on Javadoc’s default treatment looking for a period and space to demarcate the end of the summary portion of the comment.
What is a dangling Java comment?
java. 1. Javadoc allows a comment to be added to a whole package by creating a file called package-info.java inside that package and adding a Javadoc comment to the package declaration in that file, for example: {code} // Flagged with “Dangling Javadoc comment”.
What are preconditions and postconditions in Java?
So, if your method always prints something, or always returns some double between 0 and 1, you would qualify those all as postconditions. Together, preconditions and postconditions fulfill a sort of “contract” or “promise” between you (the implementor) and whoever is using your method or class (the client).
What is a documentation comment in Java?
Documentation comments allow you to embed information about your program into the program itself. You can then use the Javadoc utility program (supplied with the JDK) to extract the information and put it into an HTML file. Documentation comments make it convenient to document your programs.
Should I mention preconditions for my methods?
Sometimes, your methods may not have preconditions. It may be that a client does not need to do or know anything at all to successfully call your method. In those cases, it’s ok to not mention preconditions at all. However, every method should have a postcondition.
What is a Javadoc comment?
This is a documentation comment and in general its called doc comment. The JDK javadoc tool uses doc comments when preparing automatically generated documentation. This chapter is all about explaining Javadoc. We will see how we can make use of Javadoc to generate useful documentation for Java code.