So I just made an app

Now how do I make it cloud-enabled? Do I need to sign up for an account?

>>8 the java docs are your friend.

http://docs.oracle.com/javase/1.4.2/docs/api/javax/swing/JTextField.html

JTextField is a lightweight component that allows the editing of a single line of text

>clicked on the super class, JTextComponent

http://docs.oracle.com/javase/1.4.2/docs/api/javax/swing/text/JTextComponent.html

found JTextArea under the list of direct known subclasses:

http://docs.oracle.com/javase/1.4.2/docs/api/javax/swing/JTextArea.html

A JTextArea is a multi-line area that displays plain text.

and I think that's what you want.