This section gives a big-picture view of what the Java language and various Java packages are all about. No syntax or code examples are covered. If you are familiar with what Java is all about, skip this section entirely and move on to the real programming topics.
See http://courses.coreservlets.com/Course-Materials/java.html for the complete tutorial series (Programming with Java 8) and associated code. That site also lets you download PDF files of each lecture for saving or printing, and includes exercises and exercise solutions for each of the topics.