By Terry Camerlengo, Andrew Monkhouse
You know how an important certification is in the Java group. SCJD examination with J2SE five, moment variation is a useful advisor to arrange for the exam.This publication has been up to date for the hot Java model, J2SE 5.0, and works its means via a venture with necessities and constitution just like the venture you are going to come across within the examination. Upon interpreting this booklet, you are going to turn into in detail acquainted with key techniques, demanding situations, and pitfalls that the examination is probably going to check you on.
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Extra info for SCJD Exam with J2SE 5
Having end-user approval is extremely important—otherwise we end up in a never-ending cycle of making one change after another to the GUI. We need someone who is (preferably) not a programmer who can look at our prototype and our final application, and tell us what needs to be changed to make them feel like it is a great application, and not just a mediocre one. These are our sample testers. They could be your spouse, your significant other, your mother, or the office secretary. They are the people who are likely to spot some feature that they consider standard, but that you have managed to leave out.
Note Chapter 3 introduces some example use cases derived from project requirements. Chapter 8 presents a full example of dealing with use cases and their translation to project functionality. qxd 11/16/05 12:09 PM Page 13 CHAPTER 2 ■ PROJECT ANALYSIS AND DESIGN Prototyping the GUI When you begin prototyping the GUI portion of the project, draw out simple layouts of the various command windows with pencil and paper. This activity will help you acquire a sense of what the user needs to see before you decide how the interface will work internally.
Generics Generics (supporting generic types at runtime in a type-safe manner) allow us to specify at compile time what a generic object will contain at runtime. An example will probably make this easier to understand. The formatting rules used in the example will be summarized at the end of this section. println(name); } } This does work; however, although we know that the returned List must contain a list of Dogs, there is nothing to stop someone else from compiling source code that assumes that the list contains Cats—it will compile without problems.