small question

[Medrano Ryan]

Hey guys hows it going, i just have a small question and mabye someone can shoot a reply or tell me how to get it going, im trying to compose a program that its main purpose is to click on certain parts of the screen at seperate intervals, i have this book called "head first java" and i really like it, but right now im about half way done with my c++ programing in easy steps book, so someone hit me up and see how i could start composing the program..
thanks guys

-Ryan

[Stan James]

Hi, welcome to the ranch! We can help you best when you show code that almost works. Right now we can't tell if you are comfortable writing a main() method or looping and timing or everything right up to the "click" part.

[Medrano Ryan]

Well since im just begining.. i know that in order to make an "object oriented" program i need to get out of main (well execpt the fact just to get the porgram running) and make sperate classes, but im sitting here thinking, that how and why would i use classes? maybe for the timing.. and the actual places to click on the screen? right now stan i wouldn't mind staying in main just because im new, thanks for the reply

-Ryan

[Nicholas Jordan]

For now, stay in main();// Do it like this:

public static void main(String[] args){
Vector victor = new Vector(10);// flexible array.
victor.put(1);// might be add() instead of put
victor.put(2);// might be insert() instead of put
victor.put(3);// might be append() instead of put
victor.put(4);// you have to read the docs for each class
victor.put(5);// There are lots of ready made classes.
/*  To use one, you declare a varable having the type   */
/*  of the class you want to use */
victor.put(6);// but sometimes the classes have static methods

The trick is static keyword is alot easier to figure out in java.

[Medrano Ryan]

cool man thanks, but so verctor is the one i need to work with?

[Rob Spoor]

Dear god no. For heaven's sake, use the combination of List and ArrayList; instead of "Vector victor = new Vector(10);" write "List victor = new ArrayList(10);".

Search for the difference between Vector and ArrayList, and it will become clear why Vector is hardly ever the class to go for.

[Campbell Ritchie]

Rob Prime is quite right. He forgot to mention however, that you can never put a 1 into a List. At least not the way you have written it. Actually I don't think a List has a put method in the first place.

[Rob Spoor]

Originally posted by Campbell Ritchie:
He forgot to mention however, that you can never put a 1 into a List.

You couldn't in Java 1.4 and before. In Java 5 and up however, if you declare the list as a List<Integer>, then the compiler will allow it, using autoboxing.

Actually I don't think a List has a put method in the first place.

It doesn't, there are add and insert methods. put is a method of Map.

[Campbell Ritchie]

When I said "at least not the way you have written it," I was hoping he would come back so we could get to List<Integer> . . .

[marc weber]

I'm still confused on the purpose of this Vector/List with respect to the original post.
[ December 09, 2007: Message edited by: marc weber ]

[Nicholas Jordan]

[marc weber:]   I'm still confused on the purpose of this Vector/List with respect to the original post.

Original poster wants to do object oriented programming. The procedural nature of main has left the orignal poster trying to get out of main(). I suggest any standard demo program, one that would be approved by the OO camp and make sure there is a way to put a main in it. Then do a new on the enclosing class and show how to call instance methods on the enclosing class.

Use the class of your choice or your own authorship, as should the original poster.
[ December 09, 2007: Message edited by: Nicholas Jordan ]

[Campbell Ritchie]

Originally posted by Nicholas Jordan:
Then do a new on the enclosing class and show how to call instance methods on the enclosing class.

I beg your pardon? What does that mean? If you are going to put data into the class then instantiate it, you have either got only static data, which won't pass muster in Campbell's school of object-oriented programming, or you have lost all your data.

I think it would be best of we went back to Stan James' original and correct advice:

show code that almost works

Medrano Ryan: Please follow Stan's advice and post something you have got whether it works or net. Round here the C++ students are taught (quite correctly) to have as little code as possible in their main() method.