DocumentListener is too slow

I'm trying to enter information into some form objects where I store my
data but this is kind of slow what I have. The problem is that when a
user types information into my Swing form, everything listed in my
changedUpdate() method (below) gets executed for each character typed.

I have a DocumentListener for each JTextField of my forms (avg. of 10
fields per form and there are 10 forms/JPanels). When the user enters
text into a field, I do the following ...

// class constructor
public TextFieldListener(JLabel label, ...) { ... }

public void changedUpdate( DocumentEvent de ) {

Document doc = de.getDocument();

// Since this listener is registered to a material form,
// I get the current material definition from FormDefinitions
// which is a static Hashtable of form types

int matId = FormDefinitions.getInstance().getCurrentMaterial();
Material material = (Material)
FormDefinitions.getInstance().get(MATERIAL_FORM, matId);

// get user typed input
String txt = doc.getText(0, doc.getLength());

// set info to my material object
if (label.getText().equals("weight")) {
material.setWeight(new Integer(txt));
}
else if (label.getText().equals("id")) {
material.setId(new Integer(txt));
}

// put the new information/material back in my storage of all form
info.
FormDefinitions.getInstance().replace(MATERIAL_FORM, matId,
material);
}

Does anyone have any better ideas, cause I don't know how to enter this
information when a user is done with a field. User doesn't have to hit
the enter key or anything. When it's typed in, it should be stored.

Any help much appreciated.

.