"); Can anyone explain the above two. BoxAdcontent.document.write("<\/script>"); You reuse code by creating new classes, but instead of creating them from scratch, you use existing classes that someone has already built and debugged. . *; public class jdbcConn { … have complete safety, because you can never access a bad pointer, make The first is quite straightforward: you simply create objects of your existing class inside the new class. Now we have a 1000 byte message. Normally you’d have a method that does more than one thing, but that’s the idea. BoxAdcontent.document.write("