By having an instance (an object) of Pair, we can find out the name of its class by calling the getClass() method, as well as Class.getName(), getSimpleName(), and getCanonicalName(), as shown in the following example:

Class<?> clazz = pair.getClass();

// modern.challenge.Pair
System.out.println("Name: " + clazz.getName());

// Pair
System.out.println("Simple name: " + clazz.getSimpleName());

// modern.challenge.Pair
System.out.println("Canonical name: " + clazz.getCanonicalName());

Notice that getSimpleName() returns the unqualified class name. Alternatively, we can obtain the class as follows:

Class<Pair> clazz = Pair.class;
Class<?> clazz = Class.forName("modern.challenge.Pair");