Google search temperature conversion websites. Choose a $($simple$)$ grap The UI design should enable the user to enter a temperature and convert it to either Celcius or Fahrenheit to see the results. Decide which type of pane to use in order to lay the GUI components out in a logical$,$ user friendly way. If applicable, program it so the cursor is sitting in an empty temperature box ready for the next input after they press their desired button. Be sure to handle an empty textBox and a textBox that has invalid number in it by catching a NumberFormatException. For example: try$\{$ get the user input from the textBox and convert it to a double ie: double temperature $=$ Double.parseDouble$($theTextBox$.$getText$())$; perform the calculation output the result $\}$ catch $($NumberFormatException err$)\{$ Alert alert $=$ new Alert$($AlertType$.$INFORMATION$)$; $//$create an Alert message box and show it alert.setTitle$("$Input Error..."$)$; alert.setHeaderText$("$Invalid input temperature"$)$; alert.showAndWait$()$; $\}$ Document your UI design choices heavily.