Strategy pattern is also called policy pattern. Here is a story about Strategy pattern. Suppose Mike sometimes speeds when driving, but he doesn’t always do that. He may be stopped by a police officer. It’s possible that the police is very nice, who would let him go without any ticket or with a simple warning. … Read more
In brief, Observer Pattern = publisher + subscriber. Observer pattern has been used in GUI action listener. Swing GUI example shows how action listener works like an observer. The following is a typical example about head hunter. There are two roles in this diagram – HeadHunter and JobSeeker. Job seekers subscribe to a head hunter, … Read more
Here is a example showing how to use constructor function in C++.
vs. Overall, dot(.) is for object itself, arrow(->) is for pointer. A good example worth a thousand words. The following example should be a good one. #include <iostream> using namespace std; class Car { public: int number; void Create() { cout << "Car created, number is: " << number << "\n" ; … Read more
Virtual keyword determines if a member function of a class can be over-ridden in its derived classes. Here is a simple example to show this.
Eclipse is a good tool for developing C++ programs in Windows. Setting up the environment sometimes cause problems for a lot of developers. Here are steps that can make it work under your Windows system. 1. update eclipse galileo to helios. 2. add CDT plugin 3. install MinGW 4. Create a sample project, and see … Read more
This tutorial belongs to Eclipse JDT Tutorial Series. ASTParser can use its setKind() method to set source to be parsed as a compilation unit, single expression, a sequence of statements, or a sequence of class body declarations. parser.setKind(ASTParser.K_COMPILATION_UNIT);parser.setKind(ASTParser.K_COMPILATION_UNIT); Any of those four can not handle a single independent method. This is not pleasant. Following the … Read more
JDT is supported by 3 pillars: Java Model, Search Engine, and AST. It is a handy tool for manipulating Java source code. However, the handy tool comes with a steep learning curve even for an experienced Java developer and there are just not enough proper code examples. This page summarizes the code examples for using … Read more
This example belongs to Eclipse JDT Tutorial Series. Normally, Eclipse JDT is used in a plug-in environment. This is the normal situation in which we deal with each project in the workspace. However, if we want to parse a large amount of java file, this approach may not be good, since it is not easy … Read more