No, you can't do that (not without using something like reflection anyway,
which would be a bad solution for things like this).

Just put all your textfields in an array.

something like:

JTextField[] txtfields = new JTextField[3];
//arrays must be explicitly initialized for objects:
for (int i = 0;i<txtfields.length;i++) {
       txtfields[i] = new JTextField();
}

Later on you loop over that same array and set the text:

for (int i = 0;i<txtfields.length;i++) {
       txtfields[i].setText("Hello " + (i+1));
}

wiz@near.it wrote in comp.lang.java.gui:

<snip>

    Let me get this straight: You have a class which has attributes
    named "jtf0", "jtf1" and so on. These attributes are of type
    JTextField and contain references to text fields displayed in
    your GUI. Right?

    The wrong way to do it is to declare the attributed public and
    use reflection. Class.getField(String) returns a Field object
    which has a get(Object o) method. This method returns the value
    of the specified field in object o.

    The right way is to it is to redesign the GUI a bit and put the
    JTextField objects into a Map with appropriate keys. Or if all
    the fields perform a similar function you could put them into
    an array.

    You have an idea about how you want to do something. Please tell
    us what you want to do because the "how" you have figured out is
    propably not a very good idea...

Hi Marco,

I think the best solution would be to use an array instead of dynamicly
accessing fields.

If you wish to access the fields of the current class you can do something
like this:

// to get/set a public/private property
this.getClass().getDeclaredField("fieldName").set(this, "newValue");
Object val = this.getClass().getDeclaredField("fieldName").get(this);

soo... in your case it would become something like this

for(int i=0;i<10;i++) {
  JTextField field = (JTextField) this.getClass().getDeclaredField("jtf" +
i).get(this);
  field.setText("hello " + i);
}

I don't know how to access temporary variables though. (In other words, the
above method works for properties of objects only, not variables declared
within a function)

Regards,
- Vincent