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java.lang.ClassNotFoundException: org.mockserver.version.Version

I am trying to start mock server with mockserver-netty-5.13.2 from shell,
java version:
11.0.9
Rough shell code like this:
java -version
echo "start shell before java -jar line"
java -jar ./mockserver-netty-5.13.2.jar -serverPort 9090 -logLevel DEBUG &> ${DIR}/mockserver.log
The exception thrown from java -jar ./mockserver-netty-5.13.2.jar -serverPort 9090
Exception in thread "main" java.lang.NoClassDefFoundError: org/mockserver/version/Version
at org.mockserver.cli.Main.<clinit>(Main.java:27)
Caused by: java.lang.ClassNotFoundException: org.mockserver.version.Version
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
... 1 more
Has anyone run into this issue and resolved it ?
Any help would be much appreciated !!!

Flutter doctor --android-licenses problem

hope you guys doing well.
I was trying to run this command in flutter console:
flutter doctor --android-licenses
here is the error:
Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema
at com.android.repository.api.SchemaModule$SchemaModuleVersion.<init>(SchemaModule.java:156)
at com.android.repository.api.SchemaModule.<init>(SchemaModule.java:75)
at com.android.sdklib.repository.AndroidSdkHandler.<clinit>(AndroidSdkHandler.java:81)
at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:73)
at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:48)
Caused by: java.lang.ClassNotFoundException: javax.xml.bind.annotation.XmlSchema
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:602)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
... 5 more
I searched a lot but I did not find out the solution.
Can someone please help me?

You need to install Android SDK Command-line tools, note you need to ensure you are having JavaJDK installed as well.

I actually find a half solution.
I opened sdkmanager and then changed this line:
set DEFAULT_JVM_OPTS="-Dcom.android.sdklib.toolsdir=%~dp0.."
to this:
set DEFAULT_JVM_OPTS="-Dcom.android.sdklib.toolsdir=%~dp0.." -XX:+IgnoreUnrecognizedVMOptions --add-modules java.se.ee
and I also changed Execute sdkmanager to this:
"%JAVA_EXE%" %DEFAULT_JVM_OPTS% -XX:+IgnoreUnrecognizedVMOptions --add-modules java.se.ee %JAVA_OPTS% %SDKMANAGER_OPTS% -classpath "%CLASSPATH%" com.android.sdklib.tool.sdkmanager.SdkManagerCli %CMD_LINE_ARGS%
but still it is not working.
here is the error:
Error occurred during initialization of boot layer
java.lang.module.FindException: Module java.se.ee not found

Flutter A newer version of the Android SDK is required. To update, run: error?

I install flutter but give some error. I know a lot of solution for this error but them are not fix for me. How can ı solve this problem ?
My JAVA_HOME at C:\Program Files\Java\jdk-13.0.2
command
C:\Users\Flamador>flutter doctor --android-licenses
A newer version of the Android SDK is required. To update, run:
C:\Users\Flamador\AppData\Local\Android\Sdk\tools\bin\sdkmanager --update
command
C:\Users\Flamador>C:\Users\Flamador\AppData\Local\Android\Sdk\tools\bin\sdkmanager
--update
Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema
at com.android.repository.api.SchemaModule$SchemaModuleVersion.<init>(SchemaModule.java:156)
at com.android.repository.api.SchemaModule.<init>(SchemaModule.java:75)
at com.android.sdklib.repository.AndroidSdkHandler.<clinit>(AndroidSdkHandler.java:81)
at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:73)
at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:48) Caused by: java.lang.ClassNotFoundException: javax.xml.bind.annotation.XmlSchema
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:602)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
... 5 more
ı try this command but ...
command
set JAVA_OPTS=-XX:+IgnoreUnrecognizedVMOptions --add-modules java.se.ee
Again
command
C:\Users\Flamador>C:\Users\Flamador\AppData\Local\Android\Sdk\tools\bin\sdkmanager --update
Error occurred during initialization of boot layer
java.lang.module.FindException: Module java.se.ee not found

Not all modules are available by default in JDK 13. To solve your problem, its a lot easier if you set your JAVA_HOME to JDK 1.8 and run the update command.

Mac JDK11: Exception in thread "main" java.lang.NoClassDefFoundError: java/sql/SQLException

New to Java here. Using IntelliJ. I wrote a simple "helloworld" Spring application that compiles just fine, but when I run it receive the following error:
/Library/Java/JavaVirtualMachines/jdk-11.0.1.jdk/Contents/Home/bin/java "-javaagent:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar=51884:/Applications/IntelliJ IDEA.app/Contents/bin" -Dfile.encoding=UTF-8 -p /Users/winston.kotzan/Development/java-spring-helloworld/bin:/Users/winston.kotzan/java/spring-framework-5.1.3/libs/spring-aop-5.1.3.RELEASE.jar:/Users/winston.kotzan/java/spring-framework-5.1.3/libs/spring-aspects-5.1.3.RELEASE.jar:/Users/winston.kotzan/java/spring-framework-5.1.3/libs/spring-beans-5.1.3.RELEASE.jar:/Users/winston.kotzan/java/spring-framework-5.1.3/libs/spring-context-5.1.3.RELEASE.jar:/Users/winston.kotzan/java/spring-framework-5.1.3/libs/spring-context-indexer-5.1.3.RELEASE.jar:/Users/winston.kotzan/java/spring-framework-5.1.3/libs/spring-context-support-5.1.3.RELEASE.jar:/Users/winston.kotzan/java/spring-framework-5.1.3/libs/spring-core-5.1.3.RELEASE.jar:/Users/winston.kotzan/java/spring-framework-5.1.3/libs/spring-expression-5.1.3.RELEASE.jar:/Users/winston.kotzan/java/spring-framework-5.1.3/libs/spring-instrument-5.1.3.RELEASE.jar:/Users/winston.kotzan/java/spring-framework-5.1.3/libs/spring-jcl-5.1.3.RELEASE.jar:/Users/winston.kotzan/java/spring-framework-5.1.3/libs/spring-jdbc-5.1.3.RELEASE.jar:/Users/winston.kotzan/java/spring-framework-5.1.3/libs/spring-jms-5.1.3.RELEASE.jar:/Users/winston.kotzan/java/spring-framework-5.1.3/libs/spring-messaging-5.1.3.RELEASE.jar:/Users/winston.kotzan/java/spring-framework-5.1.3/libs/spring-orm-5.1.3.RELEASE.jar:/Users/winston.kotzan/java/spring-framework-5.1.3/libs/spring-oxm-5.1.3.RELEASE.jar:/Users/winston.kotzan/java/spring-framework-5.1.3/libs/spring-test-5.1.3.RELEASE.jar:/Users/winston.kotzan/java/spring-framework-5.1.3/libs/spring-tx-5.1.3.RELEASE.jar:/Users/winston.kotzan/java/spring-framework-5.1.3/libs/spring-web-5.1.3.RELEASE.jar:/Users/winston.kotzan/java/spring-framework-5.1.3/libs/spring-webflux-5.1.3.RELEASE.jar:/Users/winston.kotzan/java/spring-framework-5.1.3/libs/spring-webmvc-5.1.3.RELEASE.jar:/Users/winston.kotzan/java/spring-framework-5.1.3/libs/spring-websocket-5.1.3.RELEASE.jar -m SpringHelloWorld/com.wakproductions.MainApp
Exception in thread "main" java.lang.NoClassDefFoundError: java/sql/SQLException
at spring.core#5.1.3.RELEASE/org.springframework.core.Constants.<init>(Constants.java:67)
at spring.beans#5.1.3.RELEASE/org.springframework.beans.factory.xml.XmlBeanDefinitionReader.<clinit>(XmlBeanDefinitionReader.java:102)
at spring.context#5.1.3.RELEASE/org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:83)
at spring.context#5.1.3.RELEASE/org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:133)
at spring.context#5.1.3.RELEASE/org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:622)
at spring.context#5.1.3.RELEASE/org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:518)
at spring.context#5.1.3.RELEASE/org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:144)
at spring.context#5.1.3.RELEASE/org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:85)
at SpringHelloWorld/com.wakproductions.MainApp.main(MainApp.java:8)
Caused by: java.lang.ClassNotFoundException: java.sql.SQLException
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:583)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
... 9 more
I suspect that it may have to do with the CLASSPATH. I tried setting the CLASSPATH environment variable, as well as adding this to the java command
-cp /Library/Java/JavaVirtualMachines/jdk-11.0.1.jdk/Contents/Home
But that does not seem to work. Might I have the incorrect CLASSPATH?

The comments about the module-info file led me to some clues. I took notice that IntelliJ seems to have created a module-info.java file with the following contents:
module SpringHelloWorld {
requires spring.context;
}
Did not realizing I was compiling a module. I deleted that file along with everything in the bin directory. Then I was able to run it by the Run menu using this option:
I can run it on the command line via:
java -Dfile.encoding=UTF-8 -classpath /Users/.../java-spring-helloworld/bin:/Users/.../<spring-framework-libs>... com.wakproductions.MainApp

Running java program using packages in multiple folders

I'm trying to run a program with the following structure:
+src
+gui
-XL.java
-moreFiles.java
+menu
-guiFiles.java
+util
-utilFiles.java
+extra
-extraFiles.java
I'm trying to compile the code by calling
javac gui/XL.java
Which succeeds.
When I try running the code with
java gui.XL
I get the following error message:
Exception in thread "main" java.lang.BootstrapMethodError: java.lang.NoClassDefFoundError: java/lang/invoke/StringConcatFactory
at gui.XL.<init>(XL.java:25)
at gui.XL.main(XL.java:58)
Caused by: java.lang.NoClassDefFoundError: java/lang/invoke/StringConcatFactory
... 2 more
Caused by: java.lang.ClassNotFoundException: java.lang.invoke.StringConcatFactory
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 2 more
I guess I have some problems with my classpath but I have no clue about how to fix it. Does anyone have any suggestions?

My problem had nothing to do with classpaths or that I wasn't using an IDE. My problem came from the fact that I was changing the 'java' command to run my java-openjdk-8 but my compiler still ran with java-openjdk-9. The solution was therefore
sudo update-alternatives --config javac #Change to java 8
sudo update-alternatives --config java #Change to java 8