Comments by Michael Hurt (Top 18 by date)

this is directly out of the log, however please also note that the comments after the NPE are what I wrote during my troubleshooting.

[21:17:01] [Server thread/ERROR]: Error occurred while enabling TestPlugin v0.0.1-SNAPSHOT (Is it up to date?)
java.lang.NullPointerException: Incorrect argument type or length in ClassBuilder constructor
at au.com.mshcraft.testplugin.ClassBuilder.builtObject(ClassBuilder.java:199) ~[?:?]
at au.com.mshcraft.testplugin.ClassBuilder.getClassObject(ClassBuilder.java:52) ~[?:?]
at au.com.mshcraft.testplugin.CommandInterpreter.<init>(CommandInterpreter.java:30) ~[?:?]
at au.com.mshcraft.testplugin.TestPlugin.onEnable(TestPlugin.java:76) ~[?:?]


This error comes from:
try {
// the decider!
if (clsCtor == null) { throw new NullPointerException("Incorrect argument type or length in ClassBuilder constructor");}
// if (cArgs == null) { throw new NullPointerException("The constructor arguments object was null");}
handler = clsCtor != null ? clsCtor.newInstance(this.cArgs) : cls.newInstance();

Ok, its clear that I am not explaining the question well enough so I will try to be more clear.

In java, I remember that


ref: stackoverflow
String s1 = "FirstString";
String s2 = "FirstString";

if(s1 == s2) {
//This condition matched true because java don't make separate object for these two string. Both strings point to same reference.
}

So as I understand it, they now both point to the same memory location. Now if I pass one of them to a class or method, will the new object contained within that class or method now also point to the same memory location?

So talking about shared data and threads in java if I (Pseudocode)
public foo() {
var = 2
whatever(var)
}

Have I just passed a pointer for that memory location to whatever or have I just passed the data and created a new memory location assigned to whatever containing duplicate data? In thread terms, does the thread keep the same memory reference for var when it begins processing whatever?

Now if I
public whatever(int var) {
var = 1
file.save(var)
}

Do the threads processing foo now contain old data?
So now if I
public foo() {
var = idk
if (idk = 3) whatever(var)

bar(var)
}

Is bar now receiving outdated information? Are the foo threads that never enter whatever now using outdated data?

Ok, I get it now. Worked perfectly.
Thanks.... :)

What about the other way for setting data? I get an error with

boolean setData(List<e> data);

@Override
public boolean setData(List<string> data) {}

Thanks. Looks interesting, I will try this and accept if works.

I think I may have just found the answer.
http://www.java2s.com/Tutorial/Java/0100__Class-Definition/Polymorphism.htm

Would that be the best approach?

This will be used to randomly create or edit/delete objects. The objects will be stored in a list which will have a limit of 10 objects. The effect will be that the objects will have a random life cycle.

Yeah, I had trouble trying to get it clear in my own head. I'll try re-writing it.

I can see that you have made some really good points there. Its sometimes difficult to expand on an idea, without implying an opinion one way or another. Whilst writing the article, I have intentionally tried to avoid forming an opinion and be objective rather than subjective. It is apparent to me now that in doing so, I have been overly cautious and avoided issues which the article should have addressed.

It will take some time to reflect on some of your ideas and either come up with some new material, or expand on the existing. The approach I wish to stick to is in keeping the article short, simple and to the point.

You are correct, I did try to keep it brief and give a general overview so as not to overload new programmers with too much information. My intention was to provide a brief introduction to some of the most important concepts, not to give an in depth lecture on each of the individual concepts. My alternate objective was to help them avoid some of the common road blocks along the way.

If you do believe that I have overlooked a concept that is extremely important, or that a section warrants reference materials or refinement. I would be all to happy to discuss any changed you might suggest.

Hi and thanks for replying. It was actually a difficult question to structure for a site such as StackOverflow as it is very ambiguous. How do you ask for something your not even sure exists? The short version is that the community there has become very intolerant and rather than helping me to improve my question, they just spammed it with a stack of down votes. This had an extremely negative impact on my reputation leaving me banned from asking further questions. In addition to the down votes, there were also a lot of negative comments which left me reluctant to post there in future.

Of course you are correct, no-one can design a template to suit a program I haven't even written yet. What I was looking for is a basic outline of a simple program which employs a range of different patterns. My hope was that it could provide some insight into which patterns are best suited to which types of situations. I just don't want to find myself beginning a section of program using the wrong type of pattern and having to re-write it.

I quickly came to realize that what I am searching for doesn't exist and so I wrote an article to help others who may have similar issues.

http://www.codeproject.com/Articles/1098482/Structured-Programing

At the moment im personally stuck on how to turn a switch case statement into a dictionary using custom IOC. Each case in the list invokes a method so I tried to load up a hashmap of the case with the method, however as soon as the compiler see's the assignment 'action.put("command", myCommand(args, user);', it immediately executes the method. And so you can see why im looking for such examples of how and where such patterns are appropriate and how others have implemented them.