TeaRound Java Application Design Stage

Question

Hi All
This would be a basic requirement. It will be a single user/Desktop
application.
The application I want to put together is :-
We have a Tea Round at work. Basically there are members in the tea
round who take it in turn to fetch it.
So what I want to do is be able to add/delete a member's name and IP
address of Desktop and then set a thread running which would wake up
on every 10 or 60 mins and send a network message saying it is your
turn.
Eventually I want a gui front-end to add/delete member or see a list
of members.
This would be a basic requirement as it develops I would evolve it
further on.
Gui Layer Classes
not worried about the classes in here yet
Data Layer Classes
Class MembersList
private Member memlist;
private int index;
final static int nextmemNo;
MembersList(){
memlist=new Member[10]
index=0
nextmemNo=1}
void AddMem(memNo, name,ipA)
void DltMem(memNo)
etc
Class Member{
private int memNo;
private String name;
private String ipAddress;
member()
member( memNo, name, ipAdd)
getters()
setters()
and maybe
Static Class WhosTurnIsItThread{
int LastMemToDoit
So MembersList would be a Container for Member Class.
Questions
1. As I said not worried about the Gui Layer yet. What other
Classes/Interfaces am I missising in the data layer.
Is there any other layers that I need to consider.
2. How where do I fit the the Thread that will wake up to send network
message.
I am a newbie trying to learn via real life secenrios so any help
would be appreciated. I want to think in Java and OO.
Sorry for bad syntax in the Java I just want get over overviews of the
Classes I have thought about.
Thanks in advance for any help
Gurmej

Answer 1

It's a sarcastic remark, the information you provided is too vague...
Like your question...
2. How where do I fit the the Thread that will wake up to send network message.answer:
Place the Thread in the place that does the wakeup in the part of your code that will wakeup and send the message...
by the way... this...
private Member memlist; // not declared as an array
memlist=new Member[10];// so this will generate a compiler errorchange to...
private Member [] memlist;// declared as an array with unknown number of elements
memlist=new Member[10];// initialized to an array with 10 elements indexed 0-9My suggestion is to write out your algorithm in psuedo code on "paper" and work out the logic, then you will get a better idea of the logic involved...
after all if it does not make logical sense to you, then the computer will throw a fit...
for example...
psuedo code algorithm for a Basic GUI
1. create window with close button
2. create input prompt
3. create input field
4. create input button
5. create output field
5. get user input when button is pressed
6. display data input in output field
7. close application if close button pressed
Now looking at the psuedo code, I can determine what I need...
1. create window with close button ==> JFrame for window creation
2. create input prompt ==> JLabel with text to prompt user for appropiate input
3. create input field ==> JTextField for user to type in data
4. create input button ==> JButton to creae button
5. create output field ==> JLabel to output results
5. get user input when button is pressed ==> ActionListener to listen for button being pressed
6. display data input in output field ==> actionPerformed() ( from ActionListener ) method to update output label
7. close application if close button pressed use setDefaultCloseOperation() ( from JFrame ) to close window.
Now that I have all this I can start building my GUI in actual code...
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class SimpleGUI extends JFrame implements ActionListener {
     private JLabel prompt;  // variable declarations
     private JTextField input; 
     private JButton submit;
     private JLabel output;
public SimpleGUI(){
     super("SimpleGUI"); // calls the parent JFrame's contructor
         /*close application if close button pressed*/
     setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // exits when close button pressed
     setLayout(new GridLayout(4,1));
     prompt = new JLabel("Type in your Name"); // create input prompt
     input = new JTextField(40);  // create input field
     submit = new JButton("Submit");  //create input button
     submit.addActionListener(this);  // adds the ActionListener to listen for button press
     output = new JLabel();  // and of course create output field
     getContentPane().add(prompt);  // blah blah...
     getContentPane().add(input);
                     getContentPane().add(submit);
     getContentPane().add(output);
     pack();
     setVisible(true);
/*display data input in output field via actionPerformed() method */
public void actionPerformed(ActionEvent ae){  // when submit button is presses it get the input
     output.setText(input.getText()); // and send the data to the output label
public static void main(String[] theArgs){
     SimpleGUI simple = new SimpleGUI();//creates window  with close button
}And now I have working code...
Hopefully this helps...
- MaxxDmg...
- ' He who never sleeps... '