You typically use comments in a Java application to a. describe code that is difficult to understand b. separate blocks of code c. provide user instructions d. none of the above. The downside to splitting this into separate methods, as I am sure you can see, is that the code becomes longer. Prompt the user for a students numeric high school grade point average (for example, 3.2) and an admission test score from 0 to 100. Question 1 __________ allows an administrator to configure a setting once, and it will automatically apply to multiple systems or users. Thus, there are commonly two different ways to write doc comments -- as API specifications, or as programming guide documentation. Be sure to provide suitable data entry prompts for the marital status. Join the DZone community and get the full member experience. It is not necessary to add links for all API names in a doc comment. Exceptions must be set apart and prominently marked as such. 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. checks are also suppressed with this option. Over 2 million developers have joined DZone. Multiple @see tags should be ordered as follows, which is roughly the same order as their arguments are searched for by javadoc, basically from nearest to farthest access, from least-qualified to fully-qualified, The following list shows this progression. Then create a new Java application called"IncomeTax" (without the quotation marks) that prompts a user for his or her marital status (single or married) and annual income (a double value), and then uses nested if statements to compute that person's tax, based on the simplified tax-rate table below. Keywords and names are offset by when mentioned in a description. We suggest you try the following to help find what youre looking for: This document describes the style guide, tag and image conventions we use in documentation comments for Java programs written at Java Software, Oracle. Q:Which of the following is the invalid identifier in Java? Display the amount of money the user will have at retirement. 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. Don't write some crazy long story about everything the code does, but also don't just write one word in it. will be able to look back at your code and understand it better. One way to take advantage of this is by d. Java supports three kinds of comment statement, as shown below: The text followed by // will be ignored by the compiler until the end of the line. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. The package doc comment should provide (directly or via links) everything necessary to allow programmers to use the package. {@link} tag. >> 1200 Checked exceptions must be included in a throws clause of the method. An example of an API specification is the on-line Java Platform, Standard Edition 7 API Specification. Where a second sorting key is needed, they could be listed either alphabetically or grouped logically. The following are the sections and headings you should use when writing a package-level comment file. This sentence ends at the first period that is followed by a blank, tab, or line terminator, or at the first tag (as defined below). API documentation (API docs) or API specifications (API specs). (preferred), The add() method enables you to insert items. An engineer would copy this whole file, rename it to package.html, and delete the lines set off with hash marks: #####. To refer to a Java class from an application without qualification, you need to import the class unless that. Define Main class. When is it the right time to write them into your code, how helpful are they and what should they contain? Note that this kind of field might be restricted to holding dates, numbers or any text. When a package is introduced, specify an @since tag in its package description and each of its classes. For information about how to use these tags, along with an example, see "Documenting Serializable Fields and Data for a Class," Section 1.6 of the Java Object Serialization Specification. End of preview. There is no dispute that these contribute to a developer's understanding and help a developer write reliable applications more quickly. Parameter names are lowercase by convention. First, launch NetBeans and close any previous projects that may be open (at the top menu go to File ==> Close All Projects). If the doc comment merely repeats the API name in sentence form, it is not providing more information. (Articles like "a", "an", and "the" can precede the noun.) Annotation - Does not directly affect program semantics, but does affect the way programs are treated by tools and libraries, which can in turn affect the semantics of the running program. text field, as in the TextField class. Package comment files - these contain package comments, Overview comment files - these contain comments about the set of packages. So lines won't wrap, limit any doc-comment lines to 80 characters. For conventions, see Use In-Line Links Economically. Step 1, Q:Your Math teacher tasks you to create an application using shell script. It began in 1979 as C with Classes at Bell Labs and first appeared in the year 1985 as C++. Improving this takes only a few seconds and makes it much easier to read. number that, A:SOLUTION :As you are asking for only the RandomNumberGenerator step, so here I have written working, Q:The files provided in the code editor to the right contain syntax and/or logic errors. Javadoc 1.2 looks for and copies to the destination directory a directory named "doc-files" in the source tree (one for each package) and its contents. Use comments to help readers understand your code. publicclassDebugTwelve4 If a class contains a main() method, that method is executed, The double data type can be used to store. Prompts the user to enter a persons name, A:Since the programming language is not mentioned, I have done the code in Python. the comment delimiters /** */ with one comment per class, interface, or
The Specification describes all aspects of the behavior of each method on which a caller can rely. We could not find a match for your search. "Save As Text Only" - does not insert a space at the end of each lines, and changes curly quotes to straight quotes. Here, Java dynamic web design project was created with the help of Netbeans IDE. (preferred). public static void main(String[] args){ This leads to other benefits methods will become smaller, as lines of code that are related will be moved somewhere else, and maybe that new method that's been created could be reused somewhere else. Place these comments directly above the method, class, constructor or any other Java element that you want to document. -tag option: If the author is unknown, use "unascribed" as the argument to @author. The compiler treats them as comments, and does no checking on them.) Q:Must answer output screenshot, editable code When you hover over a method call, you will get nicely formatted documentation,
Thank you. System.out.println(userAge + " \nis " + userName + "'s age. When you create a file, %I% is set to 1.1. Adding two numbers in programming is essentially the same as adding two numbers in general arithmetic. Note that an API specification with this correction would still maintain its implementation-independence. standards, where "void element" tags (tags with no enclosing content) such as
Eclipse can also read these comments. When referring to a method or constructor that has multiple forms, and you mean to refer to a specific form, use parentheses and argument types. Each line above is indented to align with the code below the comment. method or class will automatically generate in all necessary @param
@param x the x-coordinate, measured in pixels. "Using Java Comments." We employ the following conventions when a tag appears more than once in a documentation comment. Please give me the code for all the 3 parts . It is critical that you get in the habit of always commenting your code
The tools we will use in this class will remind you to write comments, help
@param x the x-coordinate. Output of your program should look close to the following and should be constructed using both String literals and variables for income, tax rate, and income tax. If you add any documentation comment or tag to m(), the "Overrides" or "Specified by" subheading and link will still appear, but no text will be copied. This contains a copyright statement. Because links call attention to themselves (by their color and underline in HTML, and by their length in source code doc comments), it can make the comments more difficult to read if used profusely. Whenever possible, supply return values for special cases (such as specifying the value returned when an out-of-bounds argument is supplied). Add an @since tag only to members added in a later version than the class. He spends many hours testing the optimal settings for a piece of safety equipment used in factories. marked with the annotation "@Override"), this is really only justifiable if the documentation for the implementing entity would not add anything to the documentation provided by the abstract definition of the method. Use synonyms for the keyword you typed, for example, try "application" instead of "software. The purpose of an API writer is to relieve the designer from some of this work. In other words, document exceptions that are independent of the underlying implementation. A @throws tag should be included for any checked exceptions (declared in the throws clause), as illustrated below, and also for any unchecked exceptions that the caller might reasonably want to catch, with the exception of NullPointerException. Which of the following is a valid variable name? You can include any or all of this information in documentation comments (and can include custom tags, handled by a custom doclet, to facilitate it). Course Hero is not sponsored or endorsed by any college or university. Code this in java. default, Javadoc will throw a "self-closing element not allowed"
Some developers include the time %U% only if they want finer resolution (due to multiple check-ins in a day). Create a simple program that Accepts and Display the Following:, A:Import java.util.Scanner class. Focus on public methods, as these are the methods that can be used in other parts of the code base, and writing a javadoc for the classes you write and when they should be used will also be helpful. It's good practice to get into the habit of putting Java comments into your source code to enhance its readability and clarity for yourself and other programmers. public class, A:Program:import java.util.Scanner;public class AtmSimDoLoop{public static void main(String[] args), A:Program Instructions:Declare the initial balance to $5000.Use do-while loop to repeatedly show the, Q:What will the following program segments display? However, formatting them in
Use them. For example, this first sentence ends at "Prof.": However, you can work around this by typing an HTML meta-character such as "&" or "<" immediately after the period, such as: In particular, write summary sentences that distinguish overloaded methods from each other. You typically use comments in a Java application to, describe code that is difficult to understand. In Eclipse, under Preferences/Java/Compiler/Javadoc,
The Javadoc tool can generate output originating from four different types of "source" files: A doc comment is written in HTML and must precede a class, field, constructor or method declaration. Be aware that the word "field" has two meanings: use "also known as" instead of "aka", use "that is" or "to be specific" instead of "i.e. If someone felt strongly they need to add @author at the member level, they could do so by running javadoc using the new 1.4
A:I have provided code and output in step 2. "." Run 1: 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 class. 
If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail: W3Schools is optimized for learning and training. Which of the following is a valid class name? There needs to be something, and sometimes it's a comment. ", and use "in other words" or "namely" instead of "viz.". There are two types of comments that should appear in
comments describe the semantics of a class, field, or method. Examples might be simplified to improve reading and learning. But the final comments must be approved by the responsible engineer. An example is not an assertion. Write an application that displays the populations for the two countries every year until the population of Mexico exceeds that of the United States, and displayThe population of Mexico will exceed the U.S. population in X years. Hope you are doing great. Export/Javadoc operation by typing in the above option (including the
Its the same sort of idea with naming variables. Also see Troubleshooting Curly Quotes (Microsoft Word) at the end of this document. O a. else It is recognized that current specifications don't always live up to this ideal. case$. A grade point average below 3.0 and an admission test score of at least 80 program, A:NOTE: Since you have posted multiple questions and according to our guidelines we are authorized to, Q:Your Science Teacher wants you to create a simple application. Why is the bubble sort inefficient for large arrays? If desired, unselect any packages for which you do, Browser for the destination folder for your documentation. Good programming practice dictates that code should never make use of default constructors in public APIs: All constructors should be explicit. Get certifiedby completinga course today! Even though self-explanatory code is ideal, writing a comment it is better than having code that makes no sense. The JDK tool that generates API documentation from documentation comments. THANK YOU :), 2-7 THis is a Java code question, please anser for all 8. thank you. Note: Java does not support nesting of multi-line comments. This will save hours of unnecessary debugging work when you forget what a method is trying to do! write a story, A:The application should have an interface between the database and the users. First week only $4.99. ThoughtCo. In the third case, if a method m() in a given class implements a method in an interface, the Javadoc tool will generate a subheading "Specified by" in the documentation for m(), with a link to the method it is implementing. operator, it will list all of the methods supported by that object's class. Multiple @author tags should be listed in chronological order, with the creator of the class listed at the top. The use of "On Windows" at the beginning of the sentence makes it clear up front that this is an implementation note. Comments can be used to explain Java code, and to make it more readable. b. strictfp "); How many times will the while loop that follows be executed if months has a value of 5? <= $30,000 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. Which domain of a typical IT infrastructure is she most likely referring, Arturo works for a product-testing company. Notice the methods and constructors are in "telescoping" order, which means the "no arg" form first, then the "1 arg" form, then the "2 arg" form, and so forth. This means that the doc comments must satisfy the needs of the conformance testing by SQA. The following are useful tips and conventions for writing descriptions in doc comments. c. Select one: The graphics primitives that draw the image will incrementally paint on the screen. Generated Javadocs are just regular HTML web pages. They are used to annotate the code in order to clarify its design and purpose. API spec bugs are bugs that are present in the method declaration or in the doc comment that affects the syntax or semantics. However, if referring to both forms of the method, omit the parentheses altogether. Document the following exceptions with the @throws tag: It is generally desirable to document the unchecked exceptions that a method can throw: this allows (but does not require) the caller to handle these exceptions. For example (in java.lang.Class): By convention, unchecked exceptions should not be included in a throws clause. The code I write should explain itself. //define a class, A://import the required package They are intended as suggestions rather than requirements to be slavishly followed if they seem overly burdensome, or if creative alternatives can be found. Long
generate documenation for your code (hence the name documentation comments). Which of the following is a valid variable name? d. either. starting "-" symbol) in to the "Extra Javadoc options"
In this respect, such a document should not be referred to in this section, but rather should be referred to in the next section. Then individual programmers can be assigned to @author at the class level. Leahy, Paul. is ignored by Java (will not be executed). UML Lab will ask you for comments whenever you add a new
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. A Short data type is used for a very short string value of 10 bytes or less.. Some developers omit the date %G% (and have been doing so) if they find it too confusing -- for example, 3/4/96, which %G% would produce for March 4th, would be interpreted by those outside the United States to mean the 3rd of April. Q:Assume we are creating an application that allows multiple users to form groups and These comments are processed by the Javadoc tool to generate the API docs. naming conventions filesystem based 6. 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. Java compilers don't care about them and when compiling the program, they just skip over them. This preview shows page 4 - 7 out of 16 pages. The special comments in the Java source code that are delimited by the /** */ delimiters. The @param tag is followed by the name (not data type) of the parameter, followed by a description of the parameter. As much as possible, write doc comments as an implementation-independent API specification. documentation comments are an integral part of programming and are mandatory in
I had a little argument with some of my family members (who have also done some coding, although one of them is still in secondary school) about this subject. box in the "Configure Javadoc arguments" dialog panel when it
Allows a single line of text to be provided. GUI application:Please design GUI, A:The Project makes use of Swing, AWT to design a calculator to perform addition operation. While this may appear tedious at first, the benefits will outweigh the effort of the
Here is what the previous example would look like after running the Javadoc tool: Returns an Image object that can then be painted on the screen. Measured in pixels. will greatly enhance your or someone else's ability to understand the code
For example, ArrayList has two add methods: add(Object) and add(int, Object): The add(int, Object) method adds an item at a specified position in this arraylist. Note the requirement for this program to use nested if statements. The first time you generate Javadocs, the ", If unset, click the configure button and browse to the Java. you've already solved in another part of the program. An API specification is a particular kind of API document, as described above. The Javadoc tool processes package.html by doing three things: At Oracle, we use the following template, Empty Template for Package-Level Doc Comment File, when creating a new package doc comment file. (Version history can also be used for determining contributors for internal purposes.). interface or member and each line of the comment should begin with a "*". Most of the following tags are specified in the Java Language Specification, First Edition. public class PartOne{ //function to convert Fahreheit To, Q:Which one of a, b, c, d correct? do. Substantive modifications should likewise be checked first. (preferred), Gets the toolkit for the component. These are the questions I want to answer. Then create a new Java application called"IncomeTax" (without the quotation marks) that prompts a user for his or her marital status (single or married) and annual income (a double value), and then uses nested if statements to compute that person's tax, based on the simplified tax-rate table below. Having an explicit @return tag makes it easier for someone to find the return value quickly. You run it on source code and it generates a report describing what style and tag errors the comments have, and recommends changes.
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