Checkstyle configuration file netbeans

There is always a wildcard group to which everything not in a named group belongs. If an import does not match a named group, the group belongs to this wildcard group. Check also has on option making it more flexible: sortStaticImportsAlphabetically - sets whether static imports grouped by top or bottom option should be sorted alphabetically or not, default value is false.

It is applied to static imports grouped with top or bottom options. This option is helping in reconciling of this Check and other tools like Eclipse's Organize Imports feature. To configure the Check allows static imports grouped to the top being sorted alphabetically:. This is how the import comparison works for static imports: we first compare the container of the static import, container is the type enclosing the static element being imported.

When the result of the comparison is 0 containers are equal , we compare the fully qualified import names. For e. Names According to this logic, HttpHeaders. Names should come after HttpHeaders.

In below example the static imports com Checks for redundant import statements. An import statement is considered redundant if:. Checks for unused import statements. Checkstyle uses a simple but very reliable algorithm to report on unused import statements. An import statement is considered unused if:. The main limitation of this check is handling the case where an imported type has the same name as a declaration, such as a member variable. For example, in the following case the import java.

Component will not be flagged as unused:. Notes Note that property excludes is not recursive, subpackages of excluded packages are not automatically excluded.

Properties name description type default value since excludes Specify packages where star imports are allowed. See notes section for details. File; import java.

CustomImportOrderCheck; import com. String "" 5. Pattern ". Dialog; import java. Window; import java. ColorSpace; import java. GwtCompatible; import com. Beta; import com.

VisibleForTesting; import org. Configuration; import static sun. If regexp property is set, then list of packages will be interpreted as regular expressions. Note, all properties for match will be used.

String[] sun 3. If regexp property is set, then list of class names will be interpreted as regular expressions. ArithmeticException; import java. List; import java. Enumeration; import java. Arrays; import sun. Include Checkstyle checks into the Eclipse build You can also run Checkstyle during a full build.

Checkstyle Maven Plugin Checkstyle can also be run during a Maven build. Exercise: Use the Checkstyle Maven Plugin 6. Target The target of this exercise is to check code being build with maven and let the build fail in case rules are violated.

Prerequisites For a introduction to maven please refer to the Apache Maven tutorial. Create a maven project Create a quick start maven project in an IDE or by using the command line like this:. Apply the Checkstyle Plugin To activate the maven-checkstyle-plugin it has to be applied to the generated pom.

Validate Run mvn clean verify to see all Checkstyle validation failures of the generated project. Exercise: How to add Checkstyle to a Gradle build 7. Check check file Gradle expects the configuration of your rules by default in root folder.

Run the build Run the gradle build task, this includes the checkstyle check or run only the checkStyleMain command to run the checkstyle checks. Configure the build to fail in case of checkstyle violoations To fail the build in case you have violations in checkstyle set the severity to error in in your checkstyle. Conclusion Integrating Checkstyle in your IDE and command line workflow with Maven or Gradle is simple and it allows you improve the quality of code over time and reach a common code style.

See License for license information. Links and Literature Eclipse Checkstyle homepage. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Stack Gives Back Safety in numbers: crowdsourcing data on nefarious IP addresses. Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually.

Also this approach maybe supported by various IDE. Usage: This filter only works in conjunction with a SuppressWarningsHolder , since that check finds the annotations in the Java files and makes them available for the filter. Because of that, a configuration that includes this filter must also include SuppressWarningsHolder as a child module of the TreeWalker.

Name of check in annotation should be written in lower case with any dotted prefix or "Check" suffix removed. In addition to an audit reporter for text or XML output, a Checker can have custom AuditListeners that handle audit events.

In order to use a custom listener, add a Checker submodule for the listener and its properties. For example, to configure a Checker so that it uses custom listener VerboseListener to print audit messages to a file named "audit. Checkstyle loads a module class according to the name of a module element, and automatically appends pre-specified package prefixes to that name in its search for a loadable class. By default, Checkstyle applies packages com. Note that the support for providing a package names XML document via command line option or as a attribute of an ant Checkstyle task has been dropped with Checkstyle 5.

A package names XML document specifies a list of package names. Here is a sample package names XML document for packages com. Notice that the packages are specified recursively - a child package element is a subpackage of its parent package element. For example, to incorporate modules from package com. Now you can configure a module of package com. MethodLimitCheck , with a shortened module element in the configuration document:. As of Checkstyle 5.

Checkstyle validates a configuration XML document when it loads the document. To validate against the above configuration DTD, include the following document type declaration in your configuration XML document:.

Checkstyle also strictly enforces the encoding attribute of an XML declaration. If Checkstyle rejects your configuration document's encoding, correct the value of the encoding attribute, or remove the encoding attribute entirely.

Checkstyle also validates a package names XML document when it loads the document. To validate against the above package names DTD, include the following document type declaration in your package names XML document:. Last Published: Version: 6. Overview A Checkstyle configuration specifies which modules to plug in and apply to Java source files. The next level of modules contains: FileSetChecks - modules that take a set of input files and fire error messages.

Filters - modules that filter audit events, including error messages, for acceptance. AuditListeners - modules that report accepted events. Modules A module element in the configuration XML document specifies a module identified by the element's name attribute.

Properties Properties of a module control how the module performs its task. Checker All configurations have root module Checker. Checker contains: FileSetCheck children: modules that check sets of files. Filter children: modules that filter audit events. AuditListener children: modules that report filtered events. Properties name description type default value basedir base directory name; stripped off in messages about files string null localeCountry locale country for messages string : either the empty string or an uppercase ISO 2-letter code default locale country for the Java Virtual Machine localeLanguage locale language for messages string : either the empty string or a lowercase ISO code default locale language for the Java Virtual Machine charset name of the file charset String System property "file.