By Peter van der Linden
ISBN-10: 0130128538
ISBN-13: 9780130128539
The number one creation to J2SE 1.5 and enterprise/server-side improvement! a global bestseller for 8 years, simply Javaa 2 is the total, obtainable Java instructional for operating programmers in any respect degrees. absolutely up-to-date and revised, this 6th version is greater than an enticing review of Java 2 general variation (J2SE 1.5) and its libraries: it is also a realistic creation to contemporary top company and server-side programming options. simply Javaa 2, 6th variation, displays either J2SE 1.5 and the newest Tomcat and servlet requirements. large new assurance contains: *New chapters on generics and enumerated kinds *New assurance of net companies, with sensible examples utilizing Google and Amazon internet companies *Simplified interactive I/O with printf() *Autoboxing and unboxing of primitive kinds *Static imports, foreach loop build, and different new language beneficial properties Peter van der Linden promises professional suggestion, transparent factors, and crisp pattern courses throughout--including dozens new to this variation. alongside the best way, he introduces: *The center language: syntax, items, interfaces, nested sessions, compiler secrets and techniques, and lots more and plenty extra *Key libraries: date and calendar, trend matching, community software program, mapped I/O, utilities and general collections *Server-side know-how: community server platforms, an entire tiny HTML net server, and XML in Java *Enterprise J2EE: Sql and JDBCa instructional, servlets and JSP and lots more and plenty extra *Client-side Java: basics of JFC/Swing GUI improvement, new type facts sharing detailsCompanion website all of the book's examples and pattern courses can be found at http://afu.com.
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Extra info for Just Java (TM) 2
Example text
Arrays of char have none of these. String is a very convenient class and you'll use it extensively in many programs. literals: A string literal is zero or more characters enclosed in double quotes, like these two lines: "That'll cost you two-fifty \n" "" // empty string The empty String is different from the null pointer. The empty String is a pointer to a String object which happens to have zero length. You can invoke all the compare, search, extract methods on an empty String. They do little, but they don't cause errors.
No methods on primitives in Java The C# language goes one step further than Java in autoboxing—you can invoke methods on primitives! Object We'll finish this chapter by describing a couple of much-used classes that we have seen informally already: Object and String. Object is the ultimate parent of every other class in the system, and it has half-a-dozen methods which therefore can be invoked on any and all objects. (An object is able to invoke the methods in all its parent classes — remember how ClockView objects could call setVisible() because they got it from their parent JFrame).
It gets you out of the method and back to where you were called from. The code below is an example: void resetFields(Customer c) { if (c==null) return; // otherwise, go on to reset the fields of c } Comments Java has comment conventions similar to those of C++. Two slashes together, "//" make the rest of the line a comment, as follows: i = 0; // the "to end-of-line" comment Comments starting with "/*" make all the characters up to and including the first "*/", be a comment. It might stretch over several lines: /* the "regular multiline" comment goes here.
Just Java (TM) 2 by Peter van der Linden
by Jeff
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