checkstyle | development tool to help programmers write Java code | Code Analyzer library

 by   checkstyle Java Version: 10.12.4 License: LGPL-2.1

kandi X-RAY | checkstyle Summary

kandi X-RAY | checkstyle Summary

checkstyle is a Java library typically used in Code Quality, Code Analyzer applications. checkstyle has no bugs, it has no vulnerabilities, it has build file available, it has a Weak Copyleft License and it has high support. You can download it from GitHub, Maven.

If you want to speed up fixing of issue and want to encourage somebody in internet to resolve any issue:.

            kandi-support Support

              checkstyle has a highly active ecosystem.
              It has 7753 star(s) with 8594 fork(s). There are 220 watchers for this library.
              There were 4 major release(s) in the last 6 months.
              There are 746 open issues and 4081 have been closed. On average issues are closed in 106 days. There are 80 open pull requests and 0 closed requests.
              It has a negative sentiment in the developer community.
              The latest version of checkstyle is 10.12.4

            kandi-Quality Quality

              checkstyle has no bugs reported.

            kandi-Security Security

              checkstyle has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              checkstyle is licensed under the LGPL-2.1 License. This license is Weak Copyleft.
              Weak Copyleft licenses have some restrictions, but you can use them in commercial projects.

            kandi-Reuse Reuse

              checkstyle releases are available to install and integrate.
              Deployable package is available in Maven.
              Build file is available. You can build the component from source.
              Installation instructions are available. Examples and code snippets are not available.

            Top functions reviewed by kandi - BETA

            kandi has reviewed checkstyle and discovered the below as its top functions. This is intended to give you an instant insight into checkstyle implemented functionality, and help decide if they suit your requirements.
            • Fill the namespaces from the coding package .
            • Collect declaration declarations .
            • Calculate distance between two scopes .
            • Skip through the given token .
            • Iterate over the navigation axis .
            • Check whether an HTML tag is present in the AST block .
            • Visit other tokens .
            • Parses a property string into a list of fragments .
            • Converts the specified parse tree into a detail node .
            • Appends all hidden comments nodes to the given parse tree .
            Get all kandi verified functions for this library.

            checkstyle Key Features

            No Key Features are available at this moment for checkstyle.

            checkstyle Examples and Code Snippets

            Is there a way to check for explicit types on Lambda variables?
            Javadot img1Lines of Code : 55dot img1License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            import java.util.List;
            import java.util.Map;
            import org.apache.commons.lang.StringUtils;
            public cla
            How to enforce constructor injection with checkstyle or PMD?
            Javadot img2Lines of Code : 38dot img2License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            public class Communication {
                @Inject @Named("SMSComms")
                CommunicationMode smsComms;
                public void setEmailCommunicator(@Named("EmailComms") CommunicationMode emailComms) {
            Suppressing Google Checkstyle warnings via checkstyle-suppressions.xml
            Javadot img3Lines of Code : 9dot img3License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            System.setProperty( "", project.projectDir.toString()+"/checkstyle-suppressions.xml" )
            checkstyle {
                toolVersion = checkStyleVersion
                configFile = file("/google_checks.xml")
            checkstyle JavadocType only on classes/interfaces/enums
            Javadot img4Lines of Code : 27dot img4License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            $ cat
            public enum TestEnum {}
            private class TestClass {}
            $ cat TestConfig.xml
            $ java -jar checkstyle-8.32-all.jar -c TestConfig.xml
            Starting audit...
            Parallel Jenkins Pipeline
            Lines of Code : 23dot img5License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            pipeline {
              agent { label 'docker' }
              stages {
                stage('Static Checks') {
                  steps {
                    parallel (
                      "cpp_check": {
                        node('cppcheck') {
                          bat '%CPP_CHECK%\\cppcheck.exe -j 4 --quiet --enable=warni
            Checkstyle, Unable to create Root Module
            Lines of Code : 13dot img6License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            Implement custom modules for checkstyle
            Javadot img7Lines of Code : 11dot img7License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            plugins {
                id 'checkstyle'  // regular Checkstyle plugin
            dependencies {
                checkstyle group: 'com.thomasjensen.checkstyle.addons', name: 'checkstyle-addons', version: '5.2.2'
            checkstyle {
                configFile file('your-checkstyle.xml')
            Apply pre-commit only on the local repository?
            Lines of Code : 28dot img8License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            $(git diff --cached --name-only | grep -E '\.(js|jsx)$')
            { echo "
            git stash -q --keep-index
            # Using "mvn test" to run all unit tests and run plugins to assert
            #   * code coverage threshold >= 85% (using surefire
            How to find which checkstyle version gradle is using?
            Lines of Code : 5dot img9License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            checkstyle {
                configFile file('your/checkstyle.xml');
                toolVersion '8.2';    // your choice here
            Jacoco coverage ratio on 0.0
            Javadot img10Lines of Code : 30dot img10License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            class Example {
            public class ExampleTest {
              public void test() {
                new Example();
            [INFO] --- jacoco-maven-plugin:0.8.3:check (d

            Community Discussions


            How to have IntelliJ formatter wrap code after the . separator?
            Asked 2022-Mar-31 at 15:19

            Is it possible to configure the IntelliJ java formatter to wrap lines after the . separator instead of before it?




            Answered 2022-Mar-31 at 15:19

            No, that's not possible. There's a feature request for that, you can follow it here



            Checkstyle Warning Eclipse "Javadoc tag should be preceded with an empty line" even though there is one
            Asked 2022-Mar-25 at 02:01

            I use Checkstyle (Google Checks) in Eclipse, and for every Javadoc tag, the compiler shows the warning "Javadoc tag should be preceded with an empty line" even though there is one. The only way to remove the warning is to introduce an HTML line break balise.

            For example:



            Answered 2021-Oct-07 at 18:56

            Check the exact bytes at that position. There's probably an actual character up there, such as a non-breaking-space; word processors commonly 'fancy up' your inputs and turn them into weird characters. For example, if you paste "hello" into word and then back into java it is no longer a string constant because word decided to turn them into curly quotes: “hello” which isn't java. That same strategy can be used to sneak non-breaking spaces and the like in there. The vast majority of blank unicode characters count as whitespace, but the checkstyle plugin may be broken in this regard (it would only consider space and tab as irrelevant). Alternatively, checkstyle may be requiring a space after the * on the empty line, so that the full set of characters on that line is \t * (tab, space, star, space).

            But most of all...

            your process is broken. You have a style checker and you're now focussing on something that is utterly irrelevant, but your javadoc is horrible.

            You have a method presumably named countDrinksInFridge(), and you 'documented' this method with javadoc that gives you completely useless non-info, and does it twice, to boot! There's a reason DRY is a near universally agreed upon fantastic tenet in programming, and you just violated it. twice, no less.

            The fact that a style checker is whining about which exact kind of space character you used but thinks it is perfectly peachy to write boneheaded javadoc should be proof enough that it's clearly not doing what it's supposed to.

            Good documentation rules are as follows. They are all based on a simple idea: Documentation should be maintained, maintenance isn't free, and documentation is hard to impossible to test, so any errors in them tend to hang around for a long time before someone realizes it is wrong. Just like in writing code, if you have needlessly taken 10 lines to code something that could have been done just as efficiently in 2, you've messed up. The same applies to documentation. Do not repeat yourself, do not provide pointless or redundant information. Say it clearly and say it succintly.

            • If you have nothing more to add because the method name exactly describes the entire nature of a method, then do not document it. The method name IS documentation. Let it stand on its own.

            • If you do have something to add but describing what it returns fully covers it, then just write the @return tag. This is fine:



            How to fix Non-resolvable import POM:
            Asked 2022-Mar-24 at 20:44

            Trying to build spring-cloud-gcp from

            1. Many failed compile/install attempts due to failed tests (unit and checkstyle) - decided to just disable and/or not fail due to tests - great, that worked, entire build (all sub projects) compiled
            2. Wanted to deploy the spring-cloud-gcp-data-firestore-sample (pom is below) to Cloud run, so changed the parent reference in the pom (as suggested/documented in the pom).
            3. Now can't compile/install spring-cloud-gcp-data-firestore-sample and get this error "**Non-resolvable import POM: was not found in**"

            I've tried:

            1. Adding additional spring maven repos to the pom (see pom below) - no luck, and based on the error message maven doesn't even seem to be checking the added repo's
            2. referencing/using different versions of the spring-boot-starter-parent - no luck, nothing changed in the error
            3. mvn -U clean compile - no luck

            Anyone got any ideas? Any suggestions greatly appreciated.



            Answered 2022-Mar-24 at 20:44

            You are inheriting version for from project.version, which is 2.3.12.RELEASE in your case.



            jakarta.servlet with Tomcat 9 - Not Found Issue
            Asked 2022-Mar-24 at 09:19

            I have a application which I am running using eclipse and tomcat 9 server. When I run the application, its opens then index.html page in browser, but the API's called inside index page are erroring with 404 status.

            I tried multiple things from various stackoverflow page but nothing seems to work.

            I have a Httpservlet with following declaration



            Answered 2022-Mar-24 at 09:19

            You're declaring a dependency on Servlet Spec 5.0 (and explicitly state that you're using a Jakarta servlet).

            Thus, it's mandatory that you're using Tomcat 10. Works as declared/designed. Not an issue.



            Suppress all rules for certain class but leave one enabled
            Asked 2022-Mar-22 at 10:31

            I want to suppress all checks for particular classes, but leave specific one enabled.

            I don't want to list explicitly all the rules I want to suppress (like showed here:, but rather to disable them all, then enable some specific one.

            In documentation I found this to disable all checks with ".*":



            Answered 2022-Mar-18 at 11:03

            Basically, fastest way is to modify checks regex with negative lookahead, e.g.



            maven-checkstyle-plugin failed to parse Java 'record'
            Asked 2022-Mar-16 at 16:42

            I'm trying to setup checkstyle in our project - but seems like Maven (v3.8.3) or maven-checkstyle-plugin (v3.1.1) itself are not aware of Java 14's record (we use Java 17).



            Answered 2022-Mar-16 at 16:42

            The plugin by default comes with Checkstyle version 8.29. Try explicitly defining the CheckStyle version (plus a small version bump to 3.1.2). For example, with version 9.2:



            How can I specify the order of imports in intellij IDEA?
            Asked 2022-Feb-24 at 05:05

            Intellij keeps reordering my imports like so:



            Answered 2022-Feb-18 at 10:32

            In IntelliJ you can go to settings -> code style -> java -> Imports Tab

            There you have the Imports layout, where you can set up your needed settings.



            Idle transactions mybatis jboss 6.4 postgres 9.6
            Asked 2022-Feb-15 at 16:39

            Some version information:

            • Jboss 6.4
            • Postgres 9.6
            • mybatis-3 CDI
            • Postgres Driver 42.2.20 JDBC 4

            I'm having a problem that is causing pretty catastrophic behavior in my system. From my debugging I've been able to deduce that an idle transaction appears to be locking a table in my database, causing the application to freeze (certain locks aren't being released). I've been able to stop the freezing my setting timeouts in mybatis but I cannot figure out what is causing the idle transaction in the first place. The good news is that its always the same UPDATE statement that appears to be blocked. However, I can't narrow down what query/trans curring and I'm seeing behavior that I understand.

            Here is the query that always seems to lock up (Some names were changed but this query normally works):



            Answered 2022-Feb-15 at 16:39

            So I discovered what the problem was. The issue really wasn't the database's fault or even the queries that were being used. It turns out that our system was using the same Transaction subsystem for both it our Data Source (Postgres Database) and our JMS messaging system. When a JMS message was sent, it created a transaction and every transactional based action that followed during the life cycle of that tread/transaction would be treated as part of that original transaction. Which includes all of our database calls.....

            This explains why a query as simple as insert into a message log was touching all of our relations in the database. The debug queries only showed me the first query/statement sent to the database, not all of the others that were used during the life cycle of the JMS message. There were several ways to fix this but my team opted for the easiest which was preventing the Data Source from using the JBoss provided Transaction Manager.



            Checkstyle disallow specific enum constant
            Asked 2022-Jan-30 at 07:34

            Is there a way to use checkstyle to disallow use of a specific enum value (other than trying to catch it with a regex)?

            I would like to prevent the usage of javax.persistence.CascadeType.ALL, but can only seem to find options to prevent using the entire javax.persistence.CascadeType enum.



            Answered 2022-Jan-30 at 07:34

            it is not so easy, but there a few ways (or workarounds?)

            1. You can use MatchXPathCheck to report violation on any usage of CascadeType.ALL. Config will look like



            Upgrading Maven plugins to Java 11
            Asked 2021-Nov-12 at 23:00

            I am upgrading my Maven-built, Java 8 app to Java 11. In my POM I specify:



            Answered 2021-Nov-12 at 18:29

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install checkstyle

            You can download it from GitHub, Maven.
            You can use checkstyle like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the checkstyle component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer For Gradle installation, please refer .


            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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