jvm | 🤗 JVM 底层原理最全知识总结 | Runtime Evironment library

 by   doocs Java Version: Current License: CC-BY-SA-4.0

kandi X-RAY | jvm Summary

kandi X-RAY | jvm Summary

jvm is a Java library typically used in Server, Runtime Evironment applications. jvm has no bugs, it has no vulnerabilities, it has a Strong Copyleft License and it has high support. However jvm build file is not available. You can download it from GitHub.

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            kandi-support Support

              jvm has a highly active ecosystem.
              It has 9538 star(s) with 2160 fork(s). There are 248 watchers for this library.
              It had no major release in the last 6 months.
              There are 11 open issues and 4 have been closed. There are no pull requests.
              It has a negative sentiment in the developer community.
              The latest version of jvm is current.

            kandi-Quality Quality

              jvm has 0 bugs and 0 code smells.

            kandi-Security Security

              jvm has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              jvm code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              jvm is licensed under the CC-BY-SA-4.0 License. This license is Strong Copyleft.
              Strong Copyleft licenses enforce sharing, and you can use them when creating open source projects.

            kandi-Reuse Reuse

              jvm releases are not available. You will need to build from source code and install.
              jvm has no build file. You will be need to create the build yourself to build the component from source.

            Top functions reviewed by kandi - BETA

            kandi has reviewed jvm and discovered the below as its top functions. This is intended to give you an instant insight into jvm implemented functionality, and help decide if they suit your requirements.
            • main entry point .
            Get all kandi verified functions for this library.

            jvm Key Features

            🤗 JVM 底层原理最全知识总结

            jvm Examples and Code Snippets

            JVM Target 1.8
            mavendot img1Lines of Code : 4dot img1no licencesLicense : No License
            copy iconCopy
            // Since 8.1.0 the drawer includes core ktx 1.3.0 which requires jvm 1.8
            kotlinOptions {
                jvmTarget = "1.8"
            Write the PID to the JVM .
            javadot img2Lines of Code : 5dot img2License : Permissive (MIT License)
            copy iconCopy
            private static void writePID() {
                    SpringApplicationBuilder app = new SpringApplicationBuilder(Application.class).web(WebApplicationType.NONE);
                    app.build().addListeners(new ApplicationPidFileWriter("./bin/shutdown.pid"));
            The jvm thread metrics .
            javadot img3Lines of Code : 4dot img3License : Permissive (MIT License)
            copy iconCopy
                JvmThreadMetrics threadMetrics() {
                    return new JvmThreadMetrics();
            Shutdown the JVM .
            javadot img4Lines of Code : 4dot img4License : Non-SPDX
            copy iconCopy
            public static void shutdown() {
                // Close caches and connection pools

            Community Discussions


            Jetpack compose BottomNavigation - java.lang.IllegalStateException: Already attached to lifecycleOwner
            Asked 2022-Apr-04 at 05:49

            When I double click the same item or if I go to each composable screen very quickly i receive an error, How do I solve this problem? I tried changing few things but I just can't solve it and I can't find any resources to fix this problem.

            Bottom Navigation implementation



            Answered 2022-Mar-06 at 09:39

            I'm facing the same problem using the latest compose navigation dependency 2.5.0-alpha03.

            I don't know why it's happening.

            Philip Dukhov is right, you should report this issue.

            Here is a dirty workaround :

            Source https://stackoverflow.com/questions/71361999


            Java, Intellij IDEA problem Unrecognized option: --add-opens=jdk.compiler/com.sun.tools.javac.code=ALL-UNNAMED
            Asked 2022-Mar-26 at 15:23

            I have newly installed



            Answered 2021-Jul-28 at 07:22

            You are running the project via Java 1.8 and add the --add-opens option to the runner. However Java 1.8 does not support it.

            So, the first option is to use Java 11 to run the project, as Java 11 can recognize this VM option.

            Another solution is to find a place where --add-opens is added and remove it. Check Run configuration in IntelliJ IDEA (VM options field) and Maven/Gradle configuration files for argLine (Maven) and jvmArgs (Gradle)

            Source https://stackoverflow.com/questions/68554693


            Springboot 2.6.0 / Spring fox 3 - Failed to start bean 'documentationPluginsBootstrapper'
            Asked 2022-Mar-25 at 06:14

            I'm trying to initiate a Springboot project using Open Jdk 15, Springboot 2.6.0, Springfox 3. We are working on a project that replaced Netty as the webserver and used Jetty instead because we do not need a non-blocking environment.

            In the code we depend primarily on Reactor API (Flux, Mono), so we can not remove org.springframework.boot:spring-boot-starter-webflux dependencies.

            I replicated the problem that we have in a new project.: https://github.com/jvacaq/spring-fox.

            I figured out that these lines in our build.gradle file are the origin of the problem.



            Answered 2022-Feb-08 at 12:36

            This problem's caused by a bug in Springfox. It's making an assumption about how Spring MVC is set up that doesn't always hold true. Specifically, it's assuming that MVC's path matching will use the Ant-based path matcher and not the PathPattern-based matcher. PathPattern-based matching has been an option for some time now and is the default as of Spring Boot 2.6.

            As described in Spring Boot 2.6's release notes, you can restore the configuration that Springfox assumes will be used by setting spring.mvc.pathmatch.matching-strategy to ant-path-matcher in your application.properties file. Note that this will only work if you are not using Spring Boot's Actuator. The Actuator always uses PathPattern-based parsing, irrespective of the configured matching-strategy. A change to Springfox will be required if you want to use it with the Actuator in Spring Boot 2.6 and later.

            Source https://stackoverflow.com/questions/70036953


            https://dl.bintray.com/kotlin/kotlin-eap 502 bad gateway
            Asked 2022-Feb-26 at 13:18

            My apk is failing to compile saying it could not get

            Plugin [id: 'org.jetbrains.kotlin.jvm', version: '1.4.21'] was not found in any of the following sources:

            When I try to visit: https://dl.bintray.com/kotlin/kotlin-eap I get a 502 bad gateway

            is this the reason why it's failing to build?

            my gradle:



            Answered 2021-Dec-14 at 02:15

            Bintray and JCenter is not supported yet

            Remove all Bintray and JCenter repository configure in your gradle file. And use mavenCentral() instead.

            Here is the solution:

            Source https://stackoverflow.com/questions/70338843


            Android Build Error: "lStar not found..."
            Asked 2022-Feb-18 at 06:59

            I have error like this after trying to build my apps in Emulator

            /Users/joel/.gradle/caches/transforms-3/06231cc1265260b25a06bafce7a4176f/transformed/core-1.7.0-alpha02/res/values/values.xml:105:5-114:25: AAPT: error: resource android:attr/lStar not found.

            I don't know what causes this error. After digging some answer which has similarly error (but in flutter) Problem. But still not solved my issue.

            I have this dependency in my project



            Answered 2021-Sep-28 at 17:18

            I managed to fix this by upgrading compileSdk to 31 and kotlin gradle plugin to 1.5.10

            Source https://stackoverflow.com/questions/69041630


            Kotlin Spring Boot bean validation not working
            Asked 2022-Feb-02 at 07:44

            I have quite a few projects that is slowly being migrated from Java to Kotlin, but I'm facing a problem when changing from Java POJO to Kotlin data classes. Bean validation stops working in REST controllers. I have created a very simple project directly from https://start.spring.io to demonstrate the failure.



            Answered 2021-Dec-16 at 07:38

            I think you are just missing @Validated annotation on top of your controller class.

            Source https://stackoverflow.com/questions/70215736


            parameter pendingDynamicLinkData specified as non-null is null
            Asked 2022-Jan-17 at 14:36
            private fun getReferralId() {
                    .addOnSuccessListener(this) { pendingDynamicLinkData ->
                        )?.let { refId ->


            Answered 2021-Dec-17 at 17:18

            it's a bug in the library due to a play services update. To fix it, you should explicitly declare that the pendingDynamicLinkData is nullable.

            Like this:

            Source https://stackoverflow.com/questions/70377724


            How to make a Spring Boot application quit on tomcat failure
            Asked 2022-Jan-15 at 09:55

            We have a bunch of microservices based on Spring Boot 2.5.4 also including spring-kafka:2.7.6 and spring-boot-actuator:2.5.4. All the services use Tomcat as servlet container and graceful shutdown enabled. These microservices are containerized using docker.
            Due to a misconfiguration, yesterday we faced a problem on one of these containers because it took a port already bound from another one.
            Log states:



            Answered 2021-Dec-17 at 08:38

            Since you have everything containerized, it's way simpler.

            Just set up a small healthcheck endpoint with Spring Web which serves to see if the server is still running, something like:

            Source https://stackoverflow.com/questions/70378200


            Criteria for default garbage collector Hotspot JVM 11/17
            Asked 2022-Jan-11 at 10:26

            I found a source describing that the default gc used changes depending on the available resources. It seems that the jvm uses either g1gc or serial gc dependnig on hardware and os.

            The serial collector is selected by default on certain hardware and operating system configurations

            Can someone point out a more detailed source on what the specific criteria is and how that would apply in a dockerized/kubernetes enivronment. In other words:

            Could setting resource requests of the pod in k8s to eg. 1500 mCpu make the jvm use serial gc and changing to 2 Cpu change the default gc to g1gc? Do the limits on when which gc is used change depending on jvm version (11 vs 17)?



            Answered 2022-Jan-11 at 10:24

            In JDK 11 and 17 Serial collector is used when there is only one CPU available. Otherwise G1 is selected

            If you limit the number of CPUS available to your container, JVM selects Serial instead of the defaultG1

            JDK11 1 CPU

            Source https://stackoverflow.com/questions/70664562


            Any difference between String.getOrElse() and String.elementAtOrElse()?
            Asked 2021-Dec-20 at 17:09

            As the title states:

            Is there any difference between String.getOrElse() and String.elementAtOrElse()? From a functional point of view they seem completely identical, maybe some performance difference?

            Same question accounts to String.getOrNull() and String.elementAtOrNull().



            Answered 2021-Dec-02 at 06:12

            The very links you included in your question allow you to see the source code of each implementation which tells you that, no, there is no difference.

            In fact elementAtOrNull literally just calls getOrNull.

            Source https://stackoverflow.com/questions/70194838

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


            No vulnerabilities reported

            Install jvm

            You can download it from GitHub.
            You can use jvm 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 jvm 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 maven.apache.org. For Gradle installation, please refer gradle.org .


            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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