PostFixCalculator

This calculator can solve any numeric post-fix notation.

• Numbers/operations/expressions can be inputted by either typing or clicking a button.
• NOTE: Everytime a number is inputted into the editable field, one MUST click ENTER each time for the input to be finalized into the calculator.
• Once the input is finished, click the equals button, "=", and the calculator will display the final answer. To calculate another expression, simply click 'C'.

This code implements:

• A simple Graphical User Interface (GUI)
• Arrays
• A stack data structure

Hope this helps!