JTextFields and model:Can i create a text model like ListModel for Lists

Question

Hi,
i'm doing a cache simulator which uses several JTextFields to show information.
The problem is this:i have a class named cache which implements the observable interface and i use various variables to update the JtextFields everytime one of these changes.
So,everytime a values changes i'm doing this ugly thing...
accessResult="0";
setChanged();
notifyObservers(accessResult);and in the applet class i receive it:
public void update(Observable o, Object arg) {
if (o.equals(this.machine.cache)) {
if (arg.equals(this.machine.cache.accessResult)) {
                        if (this.machine.cache.accessResult == "0") {
                            this.resultTextField.setForeground(Color.red);
                            this.resultTextField.setText("MISS");
else if...//other variable
//other variable
}Anyway maybe i need to implement a model for each of the 10 JtextFields
so that they update automatically.
I dont know if this is feasible but i imagine i can do it just like i set up a model for a JList.
I think that the best way is to create the models and then call once the notifyObservers() which should only do a repaint.
Am i correct?
I think i'm missing something(maybe many things) about the correct use of the Observer-Observable (i've seen some tutorials)
but i need to know if i can render my work more elegant but not rewriting all code.
Thank you very much.
Chris

Answer 1

i use the JtextFields for output.
Sorry i'm new to java and even if i program intensively for the last 8 months
some things are not so clear to me..
Ok i know that exists the default model which i can get like this:
pcTextField.getDocument();should i register the document listener with the JtextField?
Please If you can, give me a very simple example(i dont want to waste your time) .
I initially thought that i have to create a proper class which implements necessary methods for
auto-update like this one i did for a JList:
class RegList implements ListModel {
        public void addListDataListener(ListDataListener l) {}
        public Object getElementAt(int i) {
            String rval = "";
            if (i < 16) {
                int regNum = i * 2;
                for (int j = 0; j < 2; j++) {
                    int theReg = regNum + j;
                    rval = rval + names[theReg] + " = " +
                           (regs[theReg]) + " ";
                return rval;
            } else {
                return rval;
        public int getSize() {
            return 32;
        public void removeListDataListener(ListDataListener l) {}
    public ListModel getRegListModel() {
        return new RegList();
}Thank you very much,
while waiting for your answer i go give a look at documentListeners.
Chris