Please write this in java.

and lecture as well as ofnl a Calculator.java (50 points) Write a program that simulates a very simple, but unconventional, calculator. The application's GUI should include two text fields F1 and F2 for numerical input and a label for output. So, to compute 23 + 56, a user enters 23 into F1 and 56 into F2. There should be four buttons labeled+, , and /. When button B is pressed, the operation (FI) B (F2) is computed and the result displayed on the label. If a button is pressed and a field FI or F2 is empty then the program should display an error message. Include a button that copies the result of the computation to Fl and another that copies the result to F2. These buttons facilitate subsequent computation using the result of the pre computation A Quit button ends the program. Listener.java (50 points) Write an application with a GUI that displays a button labeled reverse and two text fields. The first text field accepts a string, and the second displays the string i reverse string should be displayed either when the cursor is in the first text field and the Enter key is pressed, or when the reverse button is clicked. That is, your listener must handle events generated by either the text field or the button. n reverse. The