What type of GUI component is used to enter the Fahrenheit temperature?
- Into a JTextField.
What type of GUI component will display the result?
- Another JTextField.

Swing has other components that might be appropriate for input and display of output, but for now, let us use JTextFields .

GUI Design

The user enters text (a String) into the Fahrenheit text field. The string will be converted into int format. We'll look at this this later.

This is similar to the application of the previous chapter; the GUI consists of JLabels and JTextFields placed into a JFrame.

Which components need a listener?