Using a Textfield to switch to displayables

I'm working with java me, I built an app using forms displayables. I'm trying to switch to other forms, based on the user's input in a textfield item. For example, I want the user to be able to type in the number "1" in the textfield and then be taken to form1 or type in "2" and be taken to form2 etc.
Here's what I did.
I added a command to the textfield item and listen on it to read textfield contents and then compare the contents as a string, to switch forms. I don't know why my code isn't working. I think maybe there's something I'm missing or my logic is not right. I'd really appreciate any help on this please.
form.setCommandListener(new CommandListener() {
public void commandAction(Command command, Displayable displayable) {
if (command == getTextFieldItemCommand()) {
if ("1".equals(TextField.getString())) {
switchDisplayable(null, form1);
} else if ("2".equals(TextField.getString())){
switchDisplayable(null, form2);
}
}
}