Java Design Patterns A Tutorial phần 2 potx

... 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

... Template Pattern 21 4 Motivation 21 4 Kinds of Methods in a Template Class 21 5 Template Method Patterns in Java 21 5 Sample Code 21 6 Templates and Callbacks 22 0 Consequences of the Template Pattern ... Pattern 22 0 Programs on the CD-ROM 22 1 Chapter 26 . The Visitor Pattern 22 2 Motivation 22 2 When to Use the Visitor Pattern 22 4 Sample Code 22 4 Visiting t...

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

... each character is needed, rather than one for each appearance of that character. 115 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 a...

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 ... class Parser implements Command { private Stack stk; private Vector actionList; private KidData kdata; private Data data; private JawtList ptable; private Chain chain; public P...

Ngày tải lên: 12/08/2014, 19:21

... đầu phần Depth. Sử dụng Gradient Map để tăng Depth Blend mode : Luminosity, Opacity : 33% Duplicate Layer Gra Map v a rồi lên, Thay đổi setting Blend mode : Soft Giảm Opacity c a layer ... Tutorial ( phần 2 ) Phần 3 : Lighting Tạo layer mới, vào Image -> Apply Image. Chuyển Blend Mode thành Screen, Sau đó sử dụng Mask x a hết toàn bộ sign ngoại trừ phần chân...

Ngày tải lên: 13/07/2014, 17:20

... variable, shape — even though that variable was declared to be a shape object — and then called the draw method again to draw a rectangle. So you used the same variable, shape, to hold a shape ... Computer class. Creating a decorator You might start by creating an abstract class that all Computer class wrap- pers have to extend (remember, an abstract class is one that can’t be used to...

Ngày tải lên: 12/08/2014, 16:21

... specification. It all starts by creating that factory specification, and I do that with an abstract factory class. Creating an abstract factory Creating the abstract factory class is easy. This class ... in Java. That’s how Java structures its file system classes — as decorators. Do you want to read data in a buffered way? You might take a look at a basic file-reading object, an Inpu...

Ngày tải lên: 12/08/2014, 16:21

... loan review process, bankers do conduct financial anal- yses, calculate operating ratios, and compare applicants with industry stan- dard performances. Larger commercial banks have wonderfully arrayed comparable ... one year’s cash flow. For additional consideration by the buyer, it might be wise to calculate the new equation of debt and salary into several past years’ actual cash flow. Are seve...

Ngày tải lên: 14/08/2014, 09:20