Thread: Advanced programming techniques

my question about java design patterns ı do not understand although ı read topics many times ı have 3 projects about design patterns ı tried to learn but in vain is there anyone to help me about my projects or to understand about design patterns thanks in advance

We can help, but better would be if you ask a specific question rather than a general and vague question. Otherwise about the best we can do is refer you to the Gang of Four book or the Head First book.

thanks for suggestions but ı have too short time to read a book and to try to understand ı need short way It did not work when ı tried to make my project by reading .I could not correlate theory with realty for example ı wonder adapter method and ı read about it many article but ı could not apply this project
(You have bought from some programmer a new class implementation Window with the following interface (it is a very powerful class, well written and efficient in use)
class Window {
public void showWindow(String title, int sizex, int sizey);
public void moveWindow(int dx, int dy);
public void closeWindow();
public void writeText(int x, int y, String text);
}

But you have a lot of programs already using another class representing windows with the following interface

interface WindowInterface {
public void CreateWindow(int x, int y, String title);
public void MoveTo(int dx, int dy);
public void Close();
public void Text(String s, int x, int y);
}

You had an old window class (but you don't like it any more and you want to stop using it).
class OldWindow implements WindowInterface { ... }

Write a new class-adapter (object-adapter), using the new bought implementation but having the legacy interface

)