A DESCRIPTION OF THE PROBLEM :
The API docs use the following code as example:
----------
JFormattedTextField tf = new JFormattedTextField();
tf.setValue(new Number(100));
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This is a bad example because it creates an instance of Number which is an abstract class. This code will never compile.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
I expected working example code, e.g.
----------
JFormattedTextField tf = new JFormattedTextField();
tf.setValue(new Integer(100));
----------

ACTUAL -
JFormattedTextField tf = new JFormattedTextField();
tf.setValue(new Number(100));


URL OF FAULTY DOCUMENTATION :
http://java.sun.com/javase/6/docs/api/javax/swing/JFormattedTextField.html