Robot World was used to introduce the concepts of programming; to give you a feel for real programs and offer visual clarification of the execution of instructions, the use of methods, if statements and while loops. We are moving on from RobotWorld, we will however be returning frequently to RobotWorld to demonstrate certain concepts.
From now on we'll be following the book more closely. You should read the book in your own time. You should also try to execute all the examples from the book; this will help cement your understanding of Java. So if you see a segment of code in the book, put it in a program and get it to work.
Some examples of assignment statements
When you write non-robot programs, it can be hard to figure what the program is doing because you can not see the program executing. It is a good idea to get your program to print information to the screen as it is executing.
Here are some related notes from the internet.