TRADEMARKS. Sun, Sun Microsystems, Sun Microelectronics, the Sun Logo, SunXTL, JavaSoft, JavaOS, the JavaSoft Logo, Java,. HotJava. Algorithms, Tools and Techniques in Java for Natural Language Processing - WS / Why Coding Standards are Important .. pdf. This document serves as the complete definition of Google's coding standards for source code in the Java™ Programming Language. A Java source file is.

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Java Coding Conventions Pdf

This document is based directly on the Java Code Conventions document issued by Sun. Microsystems, Inc. The source document was. One option is to use wayback machine, which seems to contain the document ( here's direct link to pdf version). However I would also be interested to find out. Java. Coding Standards. Prepared by: ESA Board for Software. Standardisation and Control. (BSSC) .. Rule 3: Define only one class or interface ruthenpress.info file. ruthenpress.info ANT.

By using our site, you acknowledge that you have read and understand our Cookie Policy , Privacy Policy , and our Terms of Service. One option is to use wayback machine, which seems to contain the document here's direct link to pdf version. However I would also be interested to find out what Oracle did with it and do they intend to get rid of it. There's a discussion on Oracle forums about this being raised to OTN support, but no response is mentioned. Update on There's now a forum posting added to the site explaining the following:. The information might not be up to date; links within the documents might not work. That is why the pages were removed. Unfortunately there are other sites that point to that document which were not updated. To avoid confusions we have re-posted the original document —with an appropriate disclaimer about the information not being up to date- while we clean up those other sites. More advanced stuff, related to logical structures in the book on page https: I think that document is dated. SEI has published the latest standards - cool and really good. The document could be found at:

It is helpful in debugging. Used to document out lines of code that are no longer applicable.. Used internally within member functions to document business logic.

The first word of the member function should be a verb. Standards For Member Functions 3. Examples openAccount printMailingList save delete This results in member functions whose purpose can be determined just by looking at its name.

Examples Customer SavingsAccount 3. Explanation of why keeping a function synchronized must be documented. If a member function is overloaded or overridden or synchronization changed. The general rule is to be as restrictive as possible when setting the visibility of a member function. What and why the member function does what it does What member function must be passed as parameters What a member function returns Known bugs Any exception that a member function throws Visibility decisions if questionable by other developers How a member function changes the object — it is to helps a developer to understand how a member function invocation will affect the target object.

Include a history of any code changes Examples of how to invoke the member function if appropriate. All concurrency issues should be addressed.

These are the assumptions made during writing of the function. Comments within the member functions Use C style comments to document out lines of unneeded code. Applicable pre conditions and post conditions under which the function will work properly. Constructors are always given the same name as their class. Internally following should be documented: Control Structures This includes comparison statements and loops Why.

Use single-line comments for business logic. Single blank lines to separate logical groups of code. This facilitates in identifying the exact order of operations in the code Write short. Examples firstName orderItems If the name of the field begins with an acronym then the acronym should be completely in lower case Example sqlDatabase 5.

This makes it easy for a developer to identify the purpose of the components as well as its type. Line 3 initialDeposit. By documenting the restrictions on the values of a field one can understand important business rules. Accesors should be used for following purpose also: Initialize the values of fields Use lazy initialization where fields are initialized by their getter member functions. The convention is to use full English words.

Because the business rule may require to add and remove to and from collections. By using accesors for constants programmer can decrease the chance of bugs and at the same time increase the maintainability of the system. If the constants can change because of some changes in the business rules as the business matures then it is better to use getter member functions for constants. It should describe: What it should be used for Any restrictions or preconditions Examples If it is not completely obvious what a parameter should be.

Standards for Classes. It also increases the chances of introducing bugs into the code from unexpected side effects of previous values of a local variable from earlier in the code. Note Reusing local variables is more efficient because less memory needs to be allocated. Whenever a local variable is used for more than one reason.

Oracle Java code conventions - Stack Overflow

Constructors private fields public member functions protected member functions private member functions finalize Use the same name of the class for the file name. Prefer higher-level breaks to lower-level breaks. For example. String yetAnotherArg. Tabs must be set exactly every 8 spaces not 4. Align the new line with the beginning of the expression at the same level on the previous line. These methods should be grouped by functionality rather than by scope or accessibility.

Break before an operator.

Object anotherArg. First the public class variables. Break after a comma. The first is preferred. Following are two examples of breaking an arithmetic expression..

Examples for use in documentation should have a shorter line length-generally no more than 70 characters. Here are some examples of breaking method calls: The first is the conventional case. The goal is to make reading and understanding the code easier. First public. The exact construction of the indentation spaces vs. If the above rules lead to confusing code or to code that's squished up against the right margin.

The second would shift the second and third lines to the far right if it used conventional indentation. For example: String yetAnotherArg.. In other words. The only reason not to initialize a variable where it's declared is if the initial value depends on some computation occurring first. The examples above use one space between the type and the identifier. Don't wait to declare variables until their first use.

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Do not put different types on the same line.: Another acceptable alternative is to use tabs. This makes it easier to add statements without accidentally introducing bugs due to forgetting to add braces.

Braces are used around all statements. Sample int i.. The enclosed statements should be indented one more level than the compound statement. The opening brace should be at the end of the line that begins the compound statement.

See the following sections for examples. If needed. Examples openAccount printMailingList save delete This results in member functions whose purpose can be determined just by looking at its name. Examples getFirstName isPersistent 3. Use prefix set to the name of the field. Examples setFirstName 3.

Constructors are always given the same name as their class. Examples Customer SavingsAccount 3. The general rule is to be as restrictive as possible when setting the visibility of a member function. If member function doesnt have to be public then make it protected, and if it doesnt have to be protecte d than make it private.

Include a history of any code changes Examples of how to invoke the member function if appropriate. Applicable pre conditions and post conditions under which the function will work properly.

These are the assumptions made during writing of the function. All concurrency issues should be addressed. Explanation of why keeping a function synchronized must be documented. If a member function is overloaded or overridden or synchronization changed, it should also be documented. Note: Its not necessary to document all the factors described above for each and every member function because not all factors are applicable to every member function.

Use single-line comments for business logic. Internally following should be documented: Control Structures This includes comparison statements and loops Why, as well as what, the code does Local variables Difficult or complex code The processing order If there are statements in the code that must be executed in a defined order 3.

Single blank lines to separate logical groups of code, such as control structures Two blank lines to separate member function definitions Specify the order of Operations: Use extra parenthesis to increase the readability of the code using AND and OR comparisons.

This facilitates in identifying the exact order of operations in the code Write short, single command lines Code should do one operation per line So only one statement should be there per line 5. Examples firstName orderItems If the name of the field begins with an acronym then the acronym should be completely in lower case Example sqlDatabase 5. This makes it easy for a developer to identify the purpose of the components as well as its type. Accesors should be used for following purpose also: Initialize the values of fields Use lazy initialization where fields are initialized by their getter member functions.

This approach makes sense for constants that are stable.

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If the constants can change because of some changes in the business rules as the business matures then it is better to use getter member functions for constants.

By using accesors for constants programmer can decrease the chance of bugs and at the same time increase the maintainability of the system. Collections, such as arrays and vectors, being more complex than single value fields have more than just standard getter and setter member function implemented for them. Because the business rule may require to add and remove to and from collections, accessor member functions need to be included to do so. Example Member function type Getter for the collection Setter for the collection Insert an object into the collection Delete an object from the collection Create and add a new object into the collection Naming Convention getCollection setCollection insertObject deleteObject newObject Example getOrderItems setOrderItems insertOrderItems deleteOrderItems newOrderItem Note The advantage of this approach is that the collection is fully encapsulated, allowing programmer to later replace it with another structure It is common to that the getter member functions be public and the setter be protected Always Initialize Static Fields because one cant assume that instances of a class will be created before a static field is accessed 6.

Whenever a local variable is used for more than one reason, it effectively decreases its cohesion, making it difficult to understand.

Naming convention (programming)

It also increases the chances of introducing bugs into the code from unexpected side effects of previous values of a local variable from earlier in the code. Note Reusing local variables is more efficient because less memory needs to be allocated, but reusing local variables decreases the maintainability of code and makes it more fragile 7. It should describe: What it should be used for Any restrictions or preconditions Examples If it is not completely obvious what a parameter should be, then it should provide one or more examples in the documentation Note Use interface as a parameter to the member function then the object itself.

Prefix the letter I or Ifc to the interface name 9.

Use the same name of the class for the file name, using the same case. First the public class variables, then the protected, then package level no access modifier , and then the private.

Google Java Style Guide

First public, then protected, then package level no access modifier , and then private. These methods should be grouped by functionality rather than by scope or accessibility. For example, a private class method can be in between two public instance methods. The goal is to make reading and understanding the code easier. The exact construction of the indentation spaces vs.

Tabs must be set exactly every 8 spaces not 4. Note: Examples for use in documentation should have a shorter line length-generally no more than 70 characters. Break before an operator. Prefer higher-level breaks to lower-level breaks.

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Align the new line with the beginning of the expression at the same level on the previous line. If the above rules lead to confusing code or to code that's squished up against the right margin, just indent 8 spaces instead. The first is preferred, since the break occurs outside the parenthesized expression, which is at a higher level. The first is the conventional case.

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