Problem:
Question- Create an application with a JFrame that:
a. Has 1 button labeled Add.
b. When the Add button is clicked, add a president's name to the frame.
c. After adding 6 presidents add a label to the frame "Max number added".
d. Disable the Add button after 6 clicks.
e. Save your file as JDemoPresidents.java.
Show the code, demonstrate it works properly and describe what it is doing.