This is an example of using var-args, and their definition by the Java compiler as pre-allocated arrays, to simulate in a simple way what is obtained with the Super Type Tokens pattern. Ugly and Raw but... funny enough!

PlayingWithVarArgs.java

// ----- ELEMENTS TO DEMONSTRATE THE USAGE
public interface Tool {
	void use();
}

public record Tool1() implements Tool{
   public void use() {
	   System.out.println("tool1");
   }
}

public record Tool2() implements Tool{
	public void use() {
		   System.out.println("tool2");
	   }
}

// ---- DEMO CLASS

public final class Demo{

  public static void main(String[] args) {
		var tmp = GenericTokens.two(new GenericToken<Tool1>(), new GenericToken<Tool2>());
		System.out.printf("%s - %s %n",tmp[0],tmp[1]);
		tmp = GenericTokens.three(new GenericToken<Tool1>(), new GenericToken<Tool2>(),new GenericToken<Tool>());
		System.out.printf("%s - %s - %s %n",tmp[0],tmp[1],tmp[2]);
	}
  
}


// ---- THE FRAMEWORK CLASSES

public final class GenericToken<U>{

	private Class<U> clazz;
	
	
	@SafeVarargs
	public GenericToken(U ... ignore) {
		@SuppressWarnings("unchecked")
		Class<U> tmp = (Class<U>) ignore.getClass().getComponentType();
		clazz = tmp;
	}
	
	public final Class<U> token(){
		return clazz;
	}
	
}


public final class GenericTokens {

	private GenericTokens() {
		throw new IllegalStateException("instantiation not allowed!");
	}
	
	public static <U,R> Class<?>[] two(GenericToken<U> u,
			                           GenericToken<R> r){
		return new Class<?>[] {u.token(),r.token()};
	}
	
	public static <U,R,S> Class<?>[] three(GenericToken<U> u,
			                               GenericToken<R> r, 
			                               GenericToken<S> s){
		return new Class<?>[] {u.token(),r.token(),s.token()};
	}
	
}