The first programming project involves writing a program that evaluates infix expressions of unsigned integers using two stacks. The program should consist of three classes. The main class should create a GUI that allows the user input an infix expression and displays the result. The GUI should look as follows:
The GUI must be generated by code that you write. You may not use a drag-and-drop GUI generator.
The second class should contain the code to perform the infix expression evaluation. The pseudocode for performing that evaluation is shown below:
tokenize the string containing the expression while there are more tokens get the next token if it is an operand push it onto the operand stack else if it is a left parenthesis push it onto the operator stack else if it is a right parenthesis while top of the operator stack not a left parenthesis pop two operands and an operator perform the calculation push the result onto the operand stack
else if it is an operator
while the operator stack is not empty and the operator at the top of the stack has higher or the same precedence than the current operator pop two operands and perform the calculation push the result onto the operand stack push the current operator on the operators stack while the operator stack is not empty pop two operands and an operator perform the calculation push the result onto the operand stack the final result is a the top of the operand stack
Be sure to add any additional methods needed to eliminate any duplication of code.
Your program is only expected to perform correctly on syntactically correct infix expressions that contain integer operands and the four arithmetic operators + – * /. It should not, however, require spaces between tokens. The usual precedence rules apply. The division performed should be integer division. A check should be made for division by zero. Should the expression contain division by zero, a checked exception DivideByZero should be thrown by the method that performs the evaluation and caught in the main class, where a JOptionPane window should be displayed containing an error message.