package LibNetUtils;

import java.lang.annotation.ElementType;
import java.lang.annotation.Target;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface NetLibraryMethod {
}

package LibNetUtils;

import com.google.auto.service.AutoService;
import javax.annotation.processing.*;
import javax.lang.model.SourceVersion;
import javax.lang.model.element.Element;
import javax.lang.model.element.TypeElement;
import javax.tools.Diagnostic;
import java.util.Set;

@AutoService(Processor.class)
@SupportedAnnotationTypes("LibNetUtils.NetLibraryMethod")
@SupportedSourceVersion(SourceVersion.RELEASE_8)
public class NetLibraryMethodProcessor extends AbstractProcessor {

    @Override
    public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
        return true;
    }
}

.
├── LICENSE
├── PetriObjModelPaint.iml
├── pom.xml
└── src
    └── main
        ├── java
        │   ├── LibNet
        │   │   └── NetLibrary.java
        │   ├── LibNetUtils
        │   │   ├── NetLibraryMethod.java
        │   │   └── NetLibraryMethodProcessor.java
        └── resources
            └── META-INF
                └── services
                    └── javax.annotation.processing.Processor

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>ua.stetsenkoinna</groupId>
    <artifactId>PetriObjModelPaint</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.netbeans.external</groupId>
            <artifactId>AbsoluteLayout</artifactId>
            <version>RELEASE150</version>
        </dependency>
        <dependency>
            <groupId>com.google.auto.service</groupId>
            <artifactId>auto-service</artifactId>
            <version>1.0-rc7</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>com.github.javaparser</groupId>
            <artifactId>javaparser-core</artifactId>
            <version>3.25.4</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <annotationProcessors>
                        <annotationProcessor>LibNetUtils.NetLibraryMethodProcessor</annotationProcessor>
                    </annotationProcessors>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

java: java.lang.ClassNotFoundException: LibNetUtils.NetLibraryMethodProcessor