HotJava has an applet that dynamically changes the contents of a Choice component. Adding an item back after removing it causes the new item to be in a different larger font. I showed Jeff Dinkins this bug in HotJava and talked with him about it.

This behavior is demonstrated by the following program (also found at ~terryc/hacks/ChoiceBug.java):

import java.lang.*;
import java.awt.*;

public class ChoiceBug extends Frame {
    static String[] list1 = {"Fee", "Fie", "Foe", "Fum"};
    static String[] list2 = {"Fee", "Fie", "Foe"};
    Choice choices;

    public ChoiceBug() {
init();
    }

    void init() {
Panel menuBox = new Panel();
choices = makeChoice(list2);
menuBox.add(choices);
add("Center", menuBox);

Button toggleButton = new Button("Toggle Choices");
Button quitButton = new Button("Quit");

Panel buttonBar = new Panel();
buttonBar.add(toggleButton);
buttonBar.add(quitButton);

add("South", buttonBar);
pack();
    }

    public boolean action(Event event, Object arg) {
String button = (String)arg;
if (button.equalsIgnoreCase("Toggle Choices")) {
if (choices.getItemCount() < list1.length) {
// add back in
choices.add(list1[list1.length - 1]);
}
else if (choices.getItemCount() > list2.length) {
// remove last
choices.remove(list2.length);
}

return true;
}
else if (button.equalsIgnoreCase("quit")) {
System.exit(0);
return true;
}

return false;
    }

    public static void main(String[] args) {
ChoiceBug it = new ChoiceBug();
it.show();
    }

    Choice makeChoice(String[] items) {
Choice choices = new Choice();
for (int i = 0; i < items.length; i++) {
choices.add(items[i]);
}

return choices;
    }
}