How to divide code in classes?

[hendrix79]

Hello everyone!
I'm new to java but i have some experience in programming. I just have a really newbie question: how do i divide java code in different classes?
Let me explain it with a banal example.
I need a program that has a button and a label. When i click on the button, i the label to change its content.
This is my pseudo-code:


graphics.java:
class graphics {

private JLabel Content;
private JButton jLabelPassword;

}

actions.java:
class actions {

handler of what button does;

}

main.java:

main class {

I DON'T KNOW WHAT

}

---end---

so... can anybody please tell me how can i split code that i need in different classes. And... once i have actions and graphics, how do i start the program? What do i have to put in the main method?

Thank you and sorry for the "stupid" question. :p

[neilcoffey]

Organisation of your program into classes is largely arbitrary, and it takes a bit of practice to get a "natural feel" for where it seems right to make the split.

To start with, try and use a separate class file for things that you see as a "concept":
- things that you can "visualise" as a separate object (e.g. a window)
- things that are re-used in different parts of your app

Use inline classes or methods to additional classes for things that you see as just "uninteresting extensions or attributes" of more global/tangible objects. So for button listeners with only a few lines of code that are specific to a particular button or buttons in a particular window, just inline them there and then:

JButton b = ...
b.addActionListener(new ActionListener() {
  public void actionPerformed(...) {}
});

[hendrix79]

Thank you. I'm just discovering it. :)