Basic Info:I’ve created an java application that is an OPC UA client with the help of Eclipse milo packages (org.eclipse.milo.opcua.sdk and org.eclipse.milo.opcua.sdk.stack.core).

The project is a Maven Project (as well as other dependencies).

Im using Java 1.8 when generating jar, because i have Oracle 19c database with the same java version.

What i want:
I just want to be able to run java application on Oracle Database.

What i tried::

1. I successfully managed to run application in windows enviroment by exporting project to Runnable jar.

2. I tried to import that jar to Oracle Database using loadjava tool:

   loadjava -user user/password@db OPCUA.jar

I got errors:

Error while creating class META-INF/versions/9/module-info
ORA-29509: incorrectly constructed binary Java class definition ORA-06512: at line 1

Error while creating class module-info
ORA-29509: incorrectly constructed binary Java class definition ORA-06512: at line 1

The following operations failed
class META-INF/versions/9/module-info: creation (createFailed)
class module-info: creation (createFailed) exiting : Failures occurred during processing

3. After that i excluded module-info and META-INF from maven build adding neccessary code to pom.xml ([/questions/46959965/maven-exclude-meta-inf-maven-folder-from-jar/46960549#46960549][]) however, it didnt helped.
4. After that i changed way of generating JAR’s in Eclipse from Extract required libraries into generated Jar to Package required libraries into generated Jar
5. I tried to import it with loadjava tool but got plenty of exceptions

Error while determining classes contained in
org/eclipse/milo/opcua/stack/core/serialization/binary/BinaryDecoderTest.java
Exception oracle.aurora.sqljdecl.ParseException: Encountered “@” at
line 40, column 9.

Error while determining classes contained in
org/eclipse/milo/opcua/stack/core/util/TaskQueue.java Exception
oracle.aurora.sqljdecl.ParseException: Encountered “default” at line
343, column

Error while determining classes contained in
org/eclipse/milo/opcua/stack/core/types/DataTypeEncoding.java
Exception oracle.aurora.sqljdecl.ParseException: Encountered “default”
at line 39, column

Error while determining classes contained in
org/eclipse/milo/opcua/stack/core/types/OpcUaDefaultBinaryEncoding.java
Exception oracle.aurora.sqljdecl.ParseException: Encountered “@” at
line 61, column 13.

Error while determining classes contained in
org/eclipse/milo/opcua/stack/core/types/DataTypeDictionary.java
Exception oracle.aurora.sqljdecl.ParseException: Encountered “default”
at line 97, column
and so on and so on… error repeats, but reasonis the same…

How Application looks like:

    package OPCUA.ORACLE;
    
    import org.eclipse.milo.opcua.sdk.client.OpcUaClient;
    import org.eclipse.milo.opcua.sdk.client.api.UaClient;
    import org.eclipse.milo.opcua.sdk.client.nodes.UaVariableNode;
    import org.eclipse.milo.opcua.stack.core.Identifiers;
    import org.eclipse.milo.opcua.stack.core.types.builtin.DataValue;
    import org.eclipse.milo.opcua.stack.core.types.builtin.LocalizedText;
    import org.eclipse.milo.opcua.stack.core.types.builtin.NodeId;
    import static org.eclipse.milo.opcua.stack.core.types.builtin.unsigned.Unsigned.uint;
    
    import java.util.concurrent.CompletableFuture;
    
    public class OPCUA {
    
        public static void main(String[] args) {
            try {
                // Create OPC UA client
                OpcUaClient client=OpcUaClient.create(
                        "opc.tcp://127.0.0.1:62541/milo",
                        endpoints ->
                            endpoints.stream()
                                .findFirst(),
                        configBuilder ->
                            configBuilder
                                .setApplicationName(LocalizedText.english("eclipse milo opc-ua client"))
                                .setApplicationUri("urn:eclipse:milo:examples:client")
                                .setRequestTimeout(uint(5000))
                                .build()
                    );
                // Connect to the server
                CompletableFuture<UaClient> future = client.connect();
                UaClient connectedClient = future.get();
    
                System.out.println("Connected to the OPC UA server.");
    
                // Read a value from a variable node
                NodeId nodeId = Identifiers.Server_ServerStatus_CurrentTime;
                UaVariableNode variableNode = connectedClient.getAddressSpace().getVariableNode(nodeId);
                DataValue value = variableNode.readValue();
                System.out.println("Value: " + value.getValue().getValue());
    
                // Disconnect the client
                client.disconnect().get();
                System.out.println("Disconnected from the OPC UA server.");
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

On the end I would like to state that im not a java developer at any point, so im totally green on those topics.

I would want to ask you, if you know what i might be doing wrong that stops me from loading JAR into Oracle Database and being able to run it.