Create a trivial jar (let's say foo.jar) which just contains a single META-INF/services/java.util.random.RandomGenerator file whose contents are:

foo.DummyRandomGenerator

Now run the following Main application with that jar in the classpath. The main() method just calls RandomGeneratorFactory.all() method:

import java.util.random.RandomGeneratorFactory;

public class Main {
    public static void main(String[] args) {
        System.out.println("available RandomGenerator(s):");
        RandomGeneratorFactory.all().map(RandomGeneratorFactory::name).forEach(System.out::println);
    }
}

javac Main.java
java -cp .:foo.jar Main

This leads to the following exception:

Exception in thread "main" java.util.ServiceConfigurationError: java.util.random.RandomGenerator: Provider foo.DummyRandomGenerator not found
    at java.base/java.util.ServiceLoader.fail(ServiceLoader.java:589)
    at java.base/java.util.ServiceLoader$LazyClassPathLookupIterator.nextProviderClass(ServiceLoader.java:1215)
    at java.base/java.util.ServiceLoader$LazyClassPathLookupIterator.hasNextService(ServiceLoader.java:1224)
    at java.base/java.util.ServiceLoader$LazyClassPathLookupIterator.hasNext(ServiceLoader.java:1269)
    at java.base/java.util.ServiceLoader$2.hasNext(ServiceLoader.java:1305)
    at java.base/java.util.ServiceLoader$ProviderSpliterator.tryAdvance(ServiceLoader.java:1485)
    at java.base/java.util.Spliterator.forEachRemaining(Spliterator.java:332)
    at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:556)
    at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:546)
    at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921)
    at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:265)
    at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:702)
    at java.base/java.util.random.RandomGeneratorFactory$FactoryMapHolder.createFactoryMap(RandomGeneratorFactory.java:149)
    at java.base/java.util.random.RandomGeneratorFactory$FactoryMapHolder.<clinit>(RandomGeneratorFactory.java:137)
    at java.base/java.util.random.RandomGeneratorFactory.getFactoryMap(RandomGeneratorFactory.java:168)
    at java.base/java.util.random.RandomGeneratorFactory.all(RandomGeneratorFactory.java:388)
    at Main.main(Main.java:6)