Easy Java Swing exercise: Tip calculator

As of June 1, 2021, restaurants in Michigan are allowed to ramp up to 50% capacity. They were restricted to 25% capacity because of health department restrictions. If you go eat at a restaurant, tip your waiter well. Photo by Bimo Luki on Unsplash

Single-purpose calculators are frequently used as exercises for Java beginners. The instructor tasks the students with writing a command line program that calculates the area of a room in square feet, or it calculates body mass index (BMI), or it converts an amount of money in one currency to another, etc.

To do the same thing with a graphical user interface (GUI), such as with Java Swing…