The first programming project involves writing a program thatevaluates infix expressions of unsigned integers using two stacks.The program should consist of three classes. The main class shouldcreate a GUI that allows the user input an infix expression anddisplays the result. The GUI should look as follows:
The GUI must be generated by code that you write. You may notuse a drag-and-drop GUI generator.
The second class should contain the code to perform the infixexpression evaluation. The pseudocode for performing thatevaluation is shown below:
tokenize the string containing the expression while there aremore tokens get the next token if it is an operand push
OR
PayPal Gateway not configured
OR
PayPal Gateway not configured