The sun.* package hierarchy for example: https://www.oracle.com/java/technologies/faq-sun-packages.html https://www.oracle.com/java/technologies/faq-sun-packag

The sun.* package hierarchy for example: https://www.oracle.com/java/technologies/faq-sun-packages.html https://www.oracle.com/java/technologies/faq-sun-packages.ht...