By David Flanagan, Brett McLaughlin
Java 5.0, code-named "Tiger", can provide to be the mostsignificant re-creation of Java because the advent of the language. With over 100 large alterations to the middle language, in addition to various library and API additions, builders have a number of new positive factors, amenities, and methods available.But with such a lot of alterations, the place do you begin? you'll learn in the course of the long, usually uninteresting language specification; you may watch for the newest 500 web page tome on suggestions and conception; you may even mess around with the hot JDK, hoping you work issues out-or you will get immediately to paintings with Java 5.0 Tiger: A Developer's Notebook.This no-nonsense, down-and-dirty advisor by way of bestselling Java authors Brett McLaughlin and David Flanagan skips all of the uninteresting prose and lecture, and jumps correct into Tiger. you should have a deal with at the very important new positive factors of the language by means of the tip of the 1st bankruptcy, and be neck-deep in code sooner than you hit the midway element. utilizing the task-oriented structure of this new sequence, you will get whole sensible insurance of generics, find out how boxing and unboxing impacts your sort conversions, comprehend the facility of varargs, write enumerated kinds and annotations, grasp Java's new formatting tools and the for/in loop, or even get a grip on concurrency within the JVM.Light on idea and lengthy on sensible program, Java 5.0 Tiger: A Developer's computing device enables you to minimize to the chase, getting directly to paintings with Tiger's new positive aspects. the recent Developer's Notebooks sequence from O'Reilly covers vital new instruments for software program builders. Emphasizing instance over rationalization and perform over concept, they concentrate on studying by way of doing-you'll get the products directly from the masters, in a casual and code-intensive sort that matches builders. If you have been fascinated about Tiger, yet have not identified the place to begin, this no-fluff, lab-style consultant is the answer.
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Extra resources for Java 1.5 Tiger: A Developer's Notebook
That variable, then, cannot make assumptions about the typing of any particular instance, as they may be different. max(box1Size, box2Size); } Chapter 2. 11 Restricting Type Parameters Suppose that you want a version of Box that only accepts numbers—and further, that based on that, you want to add some functionality that's specific to numbers. To accomplish this, you need to restrict the types that are allowed. 1 How do I do that? This is pretty simple—you can actually insert an extends className onto your type variable, and voila!
Enums override toString( ) The toString( ) method on an enumerated type returns the name of the value. toString( ) returns the String "INCOMPLETE". However, this method isn't final, and can be overridden if desired.
Additionally, enumerated types have a working equals( ), for use in collection classes (see Maps of Enums and Sets of Enums later in this chapter). Comparable As a result, enum values can be compared with compareTo( ), and ordering occurs in the same order as values are declared in the enum declaration. Enums override toString( ) The toString( ) method on an enumerated type returns the name of the value. toString( ) returns the String "INCOMPLETE". However, this method isn't final, and can be overridden if desired.