In Java, how do I dynamically determine the type of an array?

Object o = new Long[0]
System.out.println( o.getClass().isArray() )
System.out.println( o.getClass().getName() )
Class ofArray = ???

true
[Ljava.lang.Long;

Class ofArray = o.getClass().getComponentType();

public <T> Class<T> testArray(T[] array) {
    return array.getClass().getComponentType();
}

Object maybeArray = ...
Class<?> clazz = maybeArray.getClass();
if (clazz.isArray()) {
    System.out.printf("Array of type %s", clazz.getComponentType());
} else {
    System.out.println("Not an array");
}

String[] arr = {"Daniel", "Chris", "Joseph"};
arr.getClass().getComponentType();              // => java.lang.String