I'm relatively new to "real" object-oriented design/development (i.e. patterns/refactoring etc.) although I've been working with OOP languages for quite some time. I've been doing a lot of reading/research in order to take it to the next level and am incorporating it into a new project I'm ...

Hi all.I have an application that I think needs to use the strategy pattern but I'm not sure. I'm fairly new to design patterns but I would like to be able to use the right one and as yet I can't see which one to use and where.My first instance of the application places a listener on a file ...

If anyone needs it - I wrote a simple wrapper for Logitech's LCD SDK, with which you can access the G15 keyboard's display and soft buttons. (WinXP only, like the original SDK) http://www.xs0.com/j15/Cheers,xs0

Hi,I have to do produce an algorithm that takes any positive integer greater than 0 and less than 500 and once i have done this I need to produce a:A list of all the factors of the given integer .A statement of how many factors the given integer has.A statement of the sum of all the factors of ...

Hi I am using java regular expression to evaluate some string and it works fine with me when the pattern is english but when the pattern contains arabic character it is not working at all what I can do here is my codeString ...

I've found a common source of memory leaks is when objects that add themselves to listener lists forget to remove themselves when they are done.It would be nice to generalize and say that listener lists should contain weak references, but there are probably valid cases where a listener's only ...

Hello,I am in a dilemma of making a design decision . We are developing a business tier component. This is going to talk to webservices on the backend. Right now it is going to integrate with 2 different backend systems through web services. In future it might support more of such backend ...

Hi all, i have a problem whit my first java 2d game.I need to draw material like water, now i use this code:public class Water{GeneralPath water=new generalPath();public Water(bla bla bla){ water.moveTo(etc etc...); water.quadTo(etc etc...);}public void drawWater(Graphics2D g2) {g2.setColor(new ...

Hello. I'm in the process of making a very simple tetris-like game, and someone suggested that it would be cool if it used bluetooth so we could play in class :). So, I come to ask you if bluetooth would be a good solution for multiplayer, celphone based games.I would love if it did, because I ...

I need to implement a pattern matching algorithm.. which searches a pattern in a directroy structure recursively.can anyone suggest an algo for this .I need to implement this in java

Hi I am trying to verify that you could have multiple instances of singleton if you use different class loader. Could somebody tell how I can verify . Here is the sample filespublic class SingletonTest {private static SingletonTest mSingleton ;public SingletonTest(){}private int x = 0;public ...

Hi I m making a software to controlling my home appliance.i m in in initial i want to which which serial ports i can use to test my program e.g com1 port 2000 can any one suggest or can any one give me link where this information i used.I m using windowsXp ...

Hi all. I looked around here for the proper way to double buffer an applet, and I think I've got it, but it's realllly choppy when it runs. (It's a little 2d jump 'n run game with not much in it yet). If you have any idea why, please tell =) Thanks!public class Game extends JApplet ...

In my application, business delegate is calling Session Facade through business interface. Session Facade is implementing business interface which includes my application business processes.In my class diagram, I am showing business delegate, business interface and Session Facade. What kind of ...

Hi all.I wanna generate patterns like below (every column is one pattern). My code missing some of them. Does anyone have a good algorithm to solve this kind of problem? Thanks ...

Hi guys,Just curious on what ppl thought on methodolgy ...what ppl would suggest could be better.Thanks.Anyway,I've just made a lottery program for fun which randomly 6 non duplicate numbers from a range of 0 - 49.These numbers get saved to a text file. I want to spice it up by it outputting ...

Hi All!I'm new to gaming.. I've developed a game called Puyo Puyo using Swings. But its got some problems... >> My game plays well for the first time but doesn't restart. >> Im unable to implement keyListeners.. they simply dont work.. >> Can someone tell me how to add ...

Hi, guysCan you tell me what is the best way to do regular expression pattern serach. I am developping a message filter. Given all word patterns(patterns are all single word), I need find if each messages matchs one of the patterns. Once find one pattern match, program will stop the process for ...

Hi all,Tell me the diff b/w DTO,BOThanx

hai Friends, I know basics of struts. I have done basic examples.I have to know , how to get dynamic values in "view".Instead of writing like this..<html:select property="color1" size="4" ><html:option value="red">red</html:option><html:option ...

I have a class A that uses class B. Class B uses class C. When I am in class A I want to retrieve data from class C. Currently, when I am in class A, I am using a method call on class B to ask class C for the data. The effect is that I am passing the data item from C to B and then from B to A. ...

Car > VW > Golf > ....Suppose we got that hierarchy where all cars provide services as startEngine(), stopEngine(), etc. On the other side a VW Golf can be automatic, can be convertible, etc. and should provice services as openRoof in case of convertible or should startEngine different ...

I have been struggling for a tree search problem for a good while. Now I decide to ask you experts for a better solution :-).Given a binary tree A. We know that every Node of A has two pointers. Leaves of A can be tested by if(node.right = =node). Namely, The right pointer of every leaf node ...

I want to get all the numerical constants from a line of java statement. Numerical constants here refer to 1. int 2. float3.doubleFor a example, by running the method on the statement "i = 232; f = 23.123f; c= f2h; int aa_2, b$99 ", we should get 232, 23.123f and f2h but not 2 and 99.How can I ...

My people in the, I really appreciate your contribution to my questions.can someone explain AWT and Applet in details, and their difference?Thank you.

My people in the house, I really appreciate your contributions to my questions.In addition, can someone explain AWT and Applet in details, and their difference?Thank you.

While working on a math problem recently that involved Pythagorean Triples I spotted a connection with the complex numbers that I had never noticed previously. It is a trivial observation and I was surprised that in my many years as a mathematician I had never heard anyone mention this little ...

hi.I want to make a Central Bank Game.I need a Java programmer.and I want source code andI want the copyrright of the source code.Can anyone help me?

Hi, i have a question:Im going to make a 2DGame, and so i need some layers(player layers, scenario layers,decorative layer etc etc),how can I make this layer?I think i can use transparent JPanel,is true?Or JPanel isn't fast for this?

Hi,I am drawing a circle which moves horizontally along the screen. I am trying to move the circle at an angle, say from left top corner to bottom top corner (angle 45 degree)I did something like thisGraphics2D g2d = (Graphics2D) getGraphics();g.translate(centerX, centerY);g.rotate(0.0174532925 ...

HiAre the following design principles correct in the case of designing enterprise application with java interfaces:1. create interfaces to all the application boundaries and controlls and entities.2. the method parameters must be specific objects instead of interfaces. If so, will this pose a ...

Anyone here has script of Baccarat Game in java ?

Hi!I'm trying to find a vertical rolling script to put on a website that registered users can be able to add news on it.Do you know if is there any?Thnks

Hi i need to read and write in a file to save and load info.In a frame works correctly but in applet mode it doesnt work.What can i do?i have to sing applet?

Hi all,I need some help to solve a design problem ( I suppose !).I磛e created an Interface declaring methods that throws an Exception and created an Adapter implementing my Interface. I thought that when I write a class that extends my Adapter it would force to write the method signature with ...

Hai friends, I am going to do sun certification(SCJP) in this month. But, don't have any sun certification materials.I can't even download files from my company also.so, ifyou have any materials regarding this please send to awm_riaz@yahoo.comIt will be very useful for me.Thanks in ...

This is the first time I used DAO design.I have a machine class and each machine has a few parts.How should I design the DAO? Especially regarding the inner parts.Should I create a DAO for machine and for part and put the PartDAO as an atribute of MachineDAO so that I can populate the ...

Hi,How do I find the partial derivative of an equation symbolically? How do I make the computer automatically find the derivative of a function without heuristics? The difference quotient can be used to find the derivative, but what about functions such as sin, cos, log, and special ...

Hi Is there any graph rendering tool that would automatically draw a tree like structure once the vertices are provided. I have a hashtable with states i have generated. so generally i have a state name and a quality and duration value. Is there anyway i can do a tree representation. Please let ...

Hello all,I'm planning on building a network game for use over the internet. Now I'm working on the network communication but I'm running into difficulties.I need a way so that when player 1 on computer 1 tells the game my character is going to move here, this is send over the internet to ...

Anyone know best ideas/sites for the proper modelling of accounts using ejbsI would like to record and query transactions for up to 30 000 clients + 10 000 agentsEach client can have more than one accountAny advice is greatly appreciated

will it be better if i use creational pattern (Abstract Factory pattern) to implement DAO?DuffyMo ?

Is there a good article / book with real examples of how to arrive at a system design / architecture from requirements ?Also, is there a defined way to organize the requirements captured so that it would be easy to translate it into design ?We have captured our requirements from a data and ...

Hey,Could any one help me understanding the below query? 1. Heard that Middleware should play a role of get and put or tranforming messages between various applications?2. Bussiness logics can be added to a middleware application? If so, is it not a Architechtural flaw to have a such design?any ...

I have a Visitor interface and I want to have 2 implementations. The only problem is one Visitor does database things so it throws SQLException and the other does IO things so it throws IOException.What are my options when declaring the visitor methods?Declare them to throw ExceptionDeclare ...

Hi there, first thx in advance for reading.i'm relative new to the whole game programming thing, but i'll just start explaining my problem.I tried to write a waterFlow Simulation, something like this: http://www.kdn.gr.jp/~shii/sand/index.htmlbut i think my concept isn't right, every ...

Dear Forum,I am facing design problem...here it goes...I have a class that contains several method having name pattern like "createXXX()".All of these methods contains similar logic except data.This class is examined bythe another class for the"createXXX" methods for futher processing.Suppose ...

I'm trying to improve the Genericity of my code by setting the return type of methods that return classes that implement the List interface to List. In other words, rather than force the class user to work with, let's say, an ArrayList returned by one of my methods, I'd like the user to be ...

How many objects in memory are too many so as to justify changing the desing?Some people think thousands is too much and they start implementing logic in stored procedures and using temporary tables to store results so they minimize the amount of objects they keep in memory.I had to rewrite ...

I need to develop the code for a blackjack game.I can't find anywhere examples of this type of code onl GUI.Can someone point me in the right direction?Thank you