Java Design Patterns A Tutorial phần 5 doc

... each character is needed, rather than one for each appearance of that character. 1 15 Discussion A flyweight is a sharable instance of a class. At first glance, each class might appear ... are also useful when you are referring to large data systems outside of Java, such as databases. The Database class we developed previously in the Façade pattern could be a candidate for...

Ngày tải lên: 12/08/2014, 19:21

... Java Beans as Bridges The Java Beans programming model is an ideal example of a Bridge pattern implementation. A Java Bean is a reusable software component that can be manipulated visually ... awtList. Pluggable Adapters A pluggable adapter is an adapter that adapts dynamically to one of several classes. Of course, the adapter can adapt only to classes that it can recogni...

Ngày tải lên: 12/08/2014, 19:21

... by designing a Façade (Figure 13.2) consisting of a Database class and a Results class, we can build a much more usable system. Figure 13.2. A Façade that encloses many of the java. sql.* classes. ... Employee(String _name, float _salary) { name = _name; salary = _salary leaf = true; } // public Employee(Employee _parent, String _name, float _salary) { name = _name;...

Ngày tải lên: 12/08/2014, 19:21

... in mathematical-graphics programs, where the program renders a curve or surface based on any equation that it can evaluate. Programs such as Mathematica and graph drawing packages such as Origin ... 157 public class Parser implements Command { private Stack stk; private Vector actionList; private KidData kdata; private Data data; private JawtList ptable; private Chain cha...

Ngày tải lên: 12/08/2014, 19:21

... these patterns is illustrated by at least one complete visual Java program. This practical approach makes design pattern concepts more concrete and easier to grasp, brings Java programmers ... sophisticated, robust Java programs. This book presents the 23 patterns cataloged in the flagship book Design Patterns by Gamma, Helm, Johnson, and Vlissides. In Java( TM )Design...

Ngày tải lên: 12/08/2014, 19:21

... The javax.comm Package as a Singleton The javax.comm package is provided separately from the Java Software Development Kit (SDK) and is downloadable from the Sun Web site. This package is designed ... you can define all of the methods in the base class, even if they don't always have an actual function. Or, if you can't change the base class, you can derive a new base cla...

Ngày tải lên: 12/08/2014, 19:21

... n a. Nhưng còn Nga, không được chia phần ư? Đầu chiến tranh cuối năm 1914, Anh và Pháp cũng đã chia nhau trước "da con gấu" với Nga rồi, h a để Nga chiếm Constantinople, còn Anh ... Lạp quy tụ ở Thrace để đợi lệnh trên. Mustapha nhất định đuổi họ ra khỏi Thrace, nhưng muốn tới Thrace thì phải qua Chanak mà quân đội Anh hiện đương đóng ở Chanak. Mustapha dùng một thuật ......

Ngày tải lên: 26/01/2014, 19:20

... instance of an array can be created and stored in a variable like any other ActionScript data type, as in this example: var employeeList:Array = new Array(); 6 e push() method of the Array class ... set. ptg ACTIONSCRIPT 3.0 FOR ADOBE FLASH PROFESSIONAL CS5 CLASSROOM IN A BOOK 1 65 Making the formatting panel draggable A common feature of interface elements like the formatting panel...

Ngày tải lên: 08/08/2014, 20:20

... improve the data elements names. Some discipline in the standardization has to be applied and all the team members have to collaborate. Abbreviations Probably because older database systems had severe ... restrictions about the representation of variables and data elements in general, the practice of abbreviating has been taught for many years and is followed by many data structure design...

Ngày tải lên: 12/08/2014, 11:20

... to open and edit Design Notes accompanies documents that have an associated Design Note. This feature also allows you to see all available Design Notes at a glance. 1 Choose Site > Manage Sites. ... that a colleague not using Dreamweaver can potentially overwrite a file that’s checked out—however, LCK files are visible in applications other than Dreamweaver, and their appearanc...

Ngày tải lên: 12/08/2014, 15:21