Question: Create a GUI program - must use DrJava 1. Creates a GUI that contains a field for a user to enter a number. If the

Create a GUI program - must use DrJava

1. Creates a GUI that contains a field for a user to enter a number. If the user enters anything that is not a number, print an error message.

2. The same GUI should also have an output field that gives the result.

3. The GUI must have both calculate and cancel buttons.

4. Please comment the code neatly and thouroughly

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