Question

I need help writing the code for a GUI calculator that uses 4 Radio Buttons (+. -, * , /). Only one button can be selected at a time. I also have to group the buttons for this i am importing the ToggleGroup and using that. The user also need to select one function to begin with or an "Error" message will show if they select the calculate button. I would really like to know what needs to be used to make the buttons functional to and have a result when the calculate button is selected. setOnAction seems to be of importance I am just not sure where to use it. Please note that the radio buttons have no initial selection but once a user makes a choice only one option is available.

No java.awt, javax.swing, or JOptionPane

also no extending of another class.

Thanks.

Answer 1

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Answer 2

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