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I am a computer science student doing my first project on the side. I deliver pizza so i figured I would make a program that aids delivery drivers. I am just starting on it today.
Here is a pic: 
Right now, you have to press enter after typing in a value in any of the boxes. I want to make it where the value under hourly earnings autoupdates when tips and hours worked boxes have numbers in them. With no need to press enter.
Use DocumentListener for your textfields and update the appropriate JLabel in your Listener implementation.